9715172931 has 24 divisors (see below), whose sum is σ = 14180647104. Its totient is φ = 6408729600.

The previous prime is 9715172899. The next prime is 9715172941. The reversal of 9715172931 is 1392715179.

It is a happy number.

It is not a de Polignac number, because 9715172931 - 2⁵ = 9715172899 is a prime.

It is a super-2 number, since 2×9715172931² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (9715172941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2849830 + ... + 2853236.

It is an arithmetic number, because the mean of its divisors is an integer number (590860296).

Almost surely, 2^9715172931 is an apocalyptic number.

9715172931 is a deficient number, since it is larger than the sum of its proper divisors (4465474173).

9715172931 is a wasteful number, since it uses less digits than its factorization.

9715172931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6651 (or 6648 counting only the distinct ones).

The product of its digits is 119070, while the sum is 45.

The square root of 9715172931 is about 98565.5768054953. The cubic root of 9715172931 is about 2133.7826449911.

The spelling of 9715172931 in words is "nine billion, seven hundred fifteen million, one hundred seventy-two thousand, nine hundred thirty-one".