975139938 has 16 divisors (see below), whose sum is σ = 2166977760. Its totient is φ = 325046628.

The previous prime is 975139927. The next prime is 975139967. The reversal of 975139938 is 839931579.

975139938 is a `hidden beast` number, since 9 + 7 + 513 + 99 + 38 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 18058147 = 975139938 / (9 + 7 + 5 + 1 + 3 + 9 + 9 + 3 + 8).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9029020 + ... + 9029127.

It is an arithmetic number, because the mean of its divisors is an integer number (135436110).

Almost surely, 2^975139938 is an apocalyptic number.

975139938 is an abundant number, since it is smaller than the sum of its proper divisors (1191837822).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

975139938 is a wasteful number, since it uses less digits than its factorization.

975139938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18058158 (or 18058152 counting only the distinct ones).

The product of its digits is 1837080, while the sum is 54.

The square root of 975139938 is about 31227.2307129531. The cubic root of 975139938 is about 991.6436790692.

The spelling of 975139938 in words is "nine hundred seventy-five million, one hundred thirty-nine thousand, nine hundred thirty-eight".