97709631 has 16 divisors (see below), whose sum is σ = 134509056. Its totient is φ = 63052416.

The previous prime is 97709621. The next prime is 97709639. The reversal of 97709631 is 13690779.

It is not a de Polignac number, because 97709631 - 2⁶ = 97709567 is a prime.

It is a super-2 number, since 2×97709631² = 19094343980312322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97709639) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11226 + ... + 17928.

It is an arithmetic number, because the mean of its divisors is an integer number (8406816).

Almost surely, 2^97709631 is an apocalyptic number.

97709631 is a deficient number, since it is larger than the sum of its proper divisors (36799425).

97709631 is a wasteful number, since it uses less digits than its factorization.

97709631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6862.

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

The square root of 97709631 is about 9884.8182077365. The cubic root of 97709631 is about 460.5878291547.

The spelling of 97709631 in words is "ninety-seven million, seven hundred nine thousand, six hundred thirty-one".