90920871 has 12 divisors (see below), whose sum is σ = 138242520. Its totient is φ = 57423600.

The previous prime is 90920857. The next prime is 90920953. The reversal of 90920871 is 17802909.

It is a happy number.

It is not a de Polignac number, because 90920871 - 2⁵ = 90920839 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90920831) 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 11 ways as a sum of consecutive naturals, for example, 265680 + ... + 266021.

It is an arithmetic number, because the mean of its divisors is an integer number (11520210).

Almost surely, 2^90920871 is an apocalyptic number.

90920871 is a deficient number, since it is larger than the sum of its proper divisors (47321649).

90920871 is a wasteful number, since it uses less digits than its factorization.

90920871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531726 (or 531723 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 90920871 is about 9535.2436256238. The cubic root of 90920871 is about 449.6637339703.

The spelling of 90920871 in words is "ninety million, nine hundred twenty thousand, eight hundred seventy-one".