97609431 has 4 divisors (see below), whose sum is σ = 130145912. Its totient is φ = 65072952.

The previous prime is 97609429. The next prime is 97609433. The reversal of 97609431 is 13490679.

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 (97609429) and next prime (97609433).

It is not a de Polignac number, because 97609431 - 2¹ = 97609429 is a prime.

It is a super-2 number, since 2×97609431² = 19055202040287522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 97609431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97609433) 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, 16268236 + ... + 16268241.

It is an arithmetic number, because the mean of its divisors is an integer number (32536478).

Almost surely, 2^97609431 is an apocalyptic number.

97609431 is a deficient number, since it is larger than the sum of its proper divisors (32536481).

97609431 is a wasteful number, since it uses less digits than its factorization.

97609431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32536480.

The product of its (nonzero) digits is 40824, while the sum is 39.

The square root of 97609431 is about 9879.7485291884. The cubic root of 97609431 is about 460.4303329600.

It can be divided in two parts, 9760 and 9431, that added together give a palindrome (19191).

The spelling of 97609431 in words is "ninety-seven million, six hundred nine thousand, four hundred thirty-one".