97438431 has 16 divisors (see below), whose sum is σ = 132685056. Its totient is φ = 63590016.

The previous prime is 97438409. The next prime is 97438447. The reversal of 97438431 is 13483479.

It is not a de Polignac number, because 97438431 - 2⁹ = 97437919 is a prime.

It is a super-2 number, since 2×97438431² = 18988495671483522, 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 97438431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97438531) 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, 26406 + ... + 29868.

It is an arithmetic number, because the mean of its divisors is an integer number (8292816).

Almost surely, 2^97438431 is an apocalyptic number.

97438431 is a deficient number, since it is larger than the sum of its proper divisors (35246625).

97438431 is a wasteful number, since it uses less digits than its factorization.

97438431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3662.

The product of its digits is 72576, while the sum is 39.

The square root of 97438431 is about 9871.0906692219. The cubic root of 97438431 is about 460.1613029145.

The spelling of 97438431 in words is "ninety-seven million, four hundred thirty-eight thousand, four hundred thirty-one".