90217974 has 32 divisors (see below), whose sum is σ = 224960256. Its totient is φ = 23433120.

The previous prime is 90217973. The next prime is 90217987. The reversal of 90217974 is 47971209.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90217973) 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, 97177 + ... + 98100.

It is an arithmetic number, because the mean of its divisors is an integer number (7030008).

Almost surely, 2^90217974 is an apocalyptic number.

90217974 is an abundant number, since it is smaller than the sum of its proper divisors (134742282).

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

90217974 is a wasteful number, since it uses less digits than its factorization.

90217974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195300.

The product of its (nonzero) digits is 31752, while the sum is 39.

The square root of 90217974 is about 9498.3142714905. The cubic root of 90217974 is about 448.5019717565.

The spelling of 90217974 in words is "ninety million, two hundred seventeen thousand, nine hundred seventy-four".