97690731 has 4 divisors (see below), whose sum is σ = 130254312. Its totient is φ = 65127152.

The previous prime is 97690709. The next prime is 97690753. The reversal of 97690731 is 13709679.

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

It is an interprime number because it is at equal distance from previous prime (97690709) and next prime (97690753).

It is a cyclic number.

It is not a de Polignac number, because 97690731 - 2⁵ = 97690699 is a prime.

It is a super-2 number, since 2×97690731² = 19086957846628722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (97690031) 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, 16281786 + ... + 16281791.

It is an arithmetic number, because the mean of its divisors is an integer number (32563578).

Almost surely, 2^97690731 is an apocalyptic number.

97690731 is a deficient number, since it is larger than the sum of its proper divisors (32563581).

97690731 is a wasteful number, since it uses less digits than its factorization.

97690731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32563580.

The product of its (nonzero) digits is 71442, while the sum is 42.

The square root of 97690731 is about 9883.8621499897. The cubic root of 97690731 is about 460.5581300308.

The spelling of 97690731 in words is "ninety-seven million, six hundred ninety thousand, seven hundred thirty-one".