97921585931 has 8 divisors (see below), whose sum is σ = 105596724240. Its totient is φ = 90266834592.

The previous prime is 97921585921. The next prime is 97921586029. The reversal of 97921585931 is 13958512979.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-97921585931 is a prime.

It is a super-2 number, since 2×97921585931² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (97921585921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5086760 + ... + 5105973.

It is an arithmetic number, because the mean of its divisors is an integer number (13199590530).

Almost surely, 2^97921585931 is an apocalyptic number.

97921585931 is a deficient number, since it is larger than the sum of its proper divisors (7675138309).

97921585931 is a wasteful number, since it uses less digits than its factorization.

97921585931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10193485.

The product of its digits is 6123600, while the sum is 59.

The spelling of 97921585931 in words is "ninety-seven billion, nine hundred twenty-one million, five hundred eighty-five thousand, nine hundred thirty-one".