90770255 has 4 divisors (see below), whose sum is σ = 108924312. Its totient is φ = 72616200.

The previous prime is 90770249. The next prime is 90770279. The reversal of 90770255 is 55207709.

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

It is not a de Polignac number, because 90770255 - 2²⁴ = 73993039 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9077021 + ... + 9077030.

It is an arithmetic number, because the mean of its divisors is an integer number (27231078).

Almost surely, 2^90770255 is an apocalyptic number.

90770255 is a deficient number, since it is larger than the sum of its proper divisors (18154057).

90770255 is a wasteful number, since it uses less digits than its factorization.

90770255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18154056.

The product of its (nonzero) digits is 22050, while the sum is 35.

The square root of 90770255 is about 9527.3424941061. The cubic root of 90770255 is about 449.4152982174.

The spelling of 90770255 in words is "ninety million, seven hundred seventy thousand, two hundred fifty-five".