97431438 has 16 divisors (see below), whose sum is σ = 209852496. Its totient is φ = 29978880.

The previous prime is 97431431. The next prime is 97431463. The reversal of 97431438 is 83413479.

It is a super-2 number, since 2×97431438² = 18985770221495688, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 97431396 and 97431405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (97431431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 624483 + ... + 624638.

It is an arithmetic number, because the mean of its divisors is an integer number (13115781).

Almost surely, 2^97431438 is an apocalyptic number.

97431438 is an abundant number, since it is smaller than the sum of its proper divisors (112421058).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

97431438 is a wasteful number, since it uses less digits than its factorization.

97431438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249139.

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

The square root of 97431438 is about 9870.7364466893. The cubic root of 97431438 is about 460.1502943047.

The spelling of 97431438 in words is "ninety-seven million, four hundred thirty-one thousand, four hundred thirty-eight".