97015931 has 4 divisors (see below), whose sum is σ = 97202664. Its totient is φ = 96829200.

The previous prime is 97015921. The next prime is 97015949. The reversal of 97015931 is 13951079.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 97015931 - 2²² = 92821627 is a prime.

It is a super-2 number, since 2×97015931² = 18824181735593522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 97015891 and 97015900.

It is not an unprimeable number, because it can be changed into a prime (97015921) 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, 92585 + ... + 93626.

It is an arithmetic number, because the mean of its divisors is an integer number (24300666).

Almost surely, 2^97015931 is an apocalyptic number.

97015931 is a deficient number, since it is larger than the sum of its proper divisors (186733).

97015931 is a wasteful number, since it uses less digits than its factorization.

97015931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186732.

The product of its (nonzero) digits is 8505, while the sum is 35.

The square root of 97015931 is about 9849.6665425790. Note that the first 3 decimals coincide. The cubic root of 97015931 is about 459.4952418575.

The spelling of 97015931 in words is "ninety-seven million, fifteen thousand, nine hundred thirty-one".