90197574 has 16 divisors (see below), whose sum is σ = 184590912. Its totient is φ = 29366568.

The previous prime is 90197551. The next prime is 90197587. The reversal of 90197574 is 47579109.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174544 + ... + 175059.

It is an arithmetic number, because the mean of its divisors is an integer number (11536932).

Almost surely, 2^90197574 is an apocalyptic number.

90197574 is an abundant number, since it is smaller than the sum of its proper divisors (94393338).

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

90197574 is a wasteful number, since it uses less digits than its factorization.

90197574 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349651.

The product of its (nonzero) digits is 79380, while the sum is 42.

The square root of 90197574 is about 9497.2403360134. The cubic root of 90197574 is about 448.4681642659.

The spelling of 90197574 in words is "ninety million, one hundred ninety-seven thousand, five hundred seventy-four".