[go: up one dir, main page]

Search a number
-
+
1609694641 = 5327572
BaseRepresentation
bin101111111110001…
…1111110110110001
311011011220221221001
41133330133312301
511244040212031
6423421202001
754614115202
oct13774376661
94134827831
101609694641
117566a3455
1238b100301
131c864b649
14113ad95a9
15964b6861
hex5ff1fdb1

1609694641 has 9 divisors (see below), whose sum is σ = 1642809441. Its totient is φ = 1577236752.

The previous prime is 1609694549. The next prime is 1609694651. The reversal of 1609694641 is 1464969061.

The square root of 1609694641 is 40121.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 186896241 + 1422798400 = 13671^2 + 37720^2 .

It is not a de Polignac number, because 1609694641 - 217 = 1609563569 is a prime.

It is a super-2 number, since 2×16096946412 = 5182233674528237762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1609694591 and 1609694600.

It is not an unprimeable number, because it can be changed into a prime (1609694651) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2126035 + ... + 2126791.

Almost surely, 21609694641 is an apocalyptic number.

1609694641 is the 40121-st square number.

1609694641 is the 20061-st centered octagonal number.

It is an amenable number.

1609694641 is a deficient number, since it is larger than the sum of its proper divisors (33114800).

1609694641 is an frugal number, since it uses more digits than its factorization.

1609694641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1620 (or 810 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 46.

The cubic root of 1609694641 is about 1171.9646153415.

The spelling of 1609694641 in words is "one billion, six hundred nine million, six hundred ninety-four thousand, six hundred forty-one".

Divisors: 1 53 757 2809 40121 573049 2126413 30371597 1609694641