90856893 has 32 divisors (see below), whose sum is σ = 128532096. Its totient is φ = 57028608.

The previous prime is 90856889. The next prime is 90856901. The reversal of 90856893 is 39865809.

It is not a de Polignac number, because 90856893 - 2² = 90856889 is a prime.

It is a super-2 number, since 2×90856893² = 16509950011226898, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90856813) 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 31 ways as a sum of consecutive naturals, for example, 663121 + ... + 663257.

It is an arithmetic number, because the mean of its divisors is an integer number (4016628).

Almost surely, 2^90856893 is an apocalyptic number.

It is an amenable number.

90856893 is a deficient number, since it is larger than the sum of its proper divisors (37675203).

90856893 is a wasteful number, since it uses less digits than its factorization.

90856893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 333.

The product of its (nonzero) digits is 466560, while the sum is 48.

The square root of 90856893 is about 9531.8882179765. Note that the first 3 decimals coincide. The cubic root of 90856893 is about 449.5582380722.

The spelling of 90856893 in words is "ninety million, eight hundred fifty-six thousand, eight hundred ninety-three".