1950193921 has 27 divisors (see below), whose sum is σ = 2189714499. Its totient is φ = 1736057232.

The previous prime is 1950193919. The next prime is 1950193933. The reversal of 1950193921 is 1293910591.

The square root of 1950193921 is 44161.

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

It can be written as a sum of positive squares in only one way, i.e., 288490225 + 1661703696 = 16985^2 + 40764^2 .

It is not a de Polignac number, because 1950193921 - 2¹ = 1950193919 is a prime.

It is a super-3 number, since 3×1950193921³ (a number of 29 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (1950193901) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 24685960 + ... + 24686038.

It is an arithmetic number, because the mean of its divisors is an integer number (81100537).

Almost surely, 2^1950193921 is an apocalyptic number.

1950193921 is the 44161-st square number.

1950193921 is the 22081-st centered octagonal number.

It is an amenable number.

1950193921 is a deficient number, since it is larger than the sum of its proper divisors (239520578).

1950193921 is an frugal number, since it uses more digits than its factorization.

1950193921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270 (or 135 counting only the distinct ones).

The product of its (nonzero) digits is 21870, while the sum is 40.

The cubic root of 1950193921 is about 1249.3743900887.

The spelling of 1950193921 in words is "one billion, nine hundred fifty million, one hundred ninety-three thousand, nine hundred twenty-one".