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10191109 = 17599477
BaseRepresentation
bin100110111000…
…000100000101
3201011202120111
4212320010011
510102103414
61002233021
7152423455
oct46700405
921152514
1010191109
115830805
1234b5771
13215a856
1414d3d65
15d648c4
hex9b8105

10191109 has 4 divisors (see below), whose sum is σ = 10790604. Its totient is φ = 9591616.

The previous prime is 10191101. The next prime is 10191119. The reversal of 10191109 is 90119101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90119101 = 850110601.

It can be written as a sum of positive squares in 2 ways, for example, as 5688225 + 4502884 = 2385^2 + 2122^2 .

It is a cyclic number.

It is not a de Polignac number, because 10191109 - 23 = 10191101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10191109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10191101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299722 + ... + 299755.

It is an arithmetic number, because the mean of its divisors is an integer number (2697651).

Almost surely, 210191109 is an apocalyptic number.

It is an amenable number.

10191109 is a deficient number, since it is larger than the sum of its proper divisors (599495).

10191109 is an equidigital number, since it uses as much as digits as its factorization.

10191109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599494.

The product of its (nonzero) digits is 81, while the sum is 22.

The square root of 10191109 is about 3192.3516410320. The cubic root of 10191109 is about 216.8072573402.

The spelling of 10191109 in words is "ten million, one hundred ninety-one thousand, one hundred nine".

Divisors: 1 17 599477 10191109