97531590 has 48 divisors (see below), whose sum is σ = 253479888. Its totient is φ = 24006528.

The previous prime is 97531589. The next prime is 97531613. The reversal of 97531590 is 9513579.

97531590 = T₄₆₅₁ + T₄₆₅₂ + ... + T₄₆₅₉.

It is a super-2 number, since 2×97531590² = 19024822095856200, which contains 22 as substring.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4549 + ... + 14688.

It is an arithmetic number, because the mean of its divisors is an integer number (5280831).

Almost surely, 2^97531590 is an apocalyptic number.

97531590 is an abundant number, since it is smaller than the sum of its proper divisors (155948298).

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

97531590 is a wasteful number, since it uses less digits than its factorization.

97531590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19273 (or 19260 counting only the distinct ones).

The product of its (nonzero) digits is 42525, while the sum is 39.

The square root of 97531590 is about 9875.8083213477. The cubic root of 97531590 is about 460.3079066444.

The spelling of 97531590 in words is "ninety-seven million, five hundred thirty-one thousand, five hundred ninety".