97688831 has 2 divisors, whose sum is σ = 97688832. Its totient is φ = 97688830.

The previous prime is 97688827. The next prime is 97688863. The reversal of 97688831 is 13888679.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97688831 - 2² = 97688827 is a prime.

It is a super-2 number, since 2×97688831² = 19086215404293122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 97688831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (97688431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48844415 + 48844416.

It is an arithmetic number, because the mean of its divisors is an integer number (48844416).

Almost surely, 2^97688831 is an apocalyptic number.

97688831 is a deficient number, since it is larger than the sum of its proper divisors (1).

97688831 is an equidigital number, since it uses as much as digits as its factorization.

97688831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 50.

The square root of 97688831 is about 9883.7660332487. The cubic root of 97688831 is about 460.5551441927. Note that the first 3 decimals are identical.

The spelling of 97688831 in words is "ninety-seven million, six hundred eighty-eight thousand, eight hundred thirty-one".