90255005 has 4 divisors (see below), whose sum is σ = 108306012. Its totient is φ = 72204000.

The previous prime is 90254971. The next prime is 90255007. The reversal of 90255005 is 50055209.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50055209 = 149 ⋅335941.

It can be written as a sum of positive squares in 2 ways, for example, as 69122596 + 21132409 = 8314^2 + 4597^2 .

It is a de Polignac number, because none of the positive numbers 2^k-90255005 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90255007) 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, 9025496 + ... + 9025505.

It is an arithmetic number, because the mean of its divisors is an integer number (27076503).

Almost surely, 2^90255005 is an apocalyptic number.

It is an amenable number.

90255005 is a deficient number, since it is larger than the sum of its proper divisors (18051007).

90255005 is a wasteful number, since it uses less digits than its factorization.

90255005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18051006.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 90255005 is about 9500.2634174006. The cubic root of 90255005 is about 448.5633276184.

The spelling of 90255005 in words is "ninety million, two hundred fifty-five thousand, five".