90864355 has 4 divisors (see below), whose sum is σ = 109037232. Its totient is φ = 72691480.

The previous prime is 90864349. The next prime is 90864359. The reversal of 90864355 is 55346809.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 90864355 - 2⁷ = 90864227 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90864359) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9086431 + ... + 9086440.

It is an arithmetic number, because the mean of its divisors is an integer number (27259308).

Almost surely, 2^90864355 is an apocalyptic number.

90864355 is a deficient number, since it is larger than the sum of its proper divisors (18172877).

90864355 is a wasteful number, since it uses less digits than its factorization.

90864355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18172876.

The product of its (nonzero) digits is 129600, while the sum is 40.

The square root of 90864355 is about 9532.2796329105. The cubic root of 90864355 is about 449.5705450149.

It can be divided in two parts, 90864 and 355, that added together give a palindrome (91219).

The spelling of 90864355 in words is "ninety million, eight hundred sixty-four thousand, three hundred fifty-five".