90255973 has 4 divisors (see below), whose sum is σ = 93167488. Its totient is φ = 87344460.

The previous prime is 90255961. The next prime is 90255983. The reversal of 90255973 is 37955209.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 37955209 = 151 ⋅251359.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90255973 is a prime.

It is a super-2 number, since 2×90255973² = 16292281324353458, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90255953) 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, 1455711 + ... + 1455772.

It is an arithmetic number, because the mean of its divisors is an integer number (23291872).

Almost surely, 2^90255973 is an apocalyptic number.

It is an amenable number.

90255973 is a deficient number, since it is larger than the sum of its proper divisors (2911515).

90255973 is a wasteful number, since it uses less digits than its factorization.

90255973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2911514.

The product of its (nonzero) digits is 85050, while the sum is 40.

The square root of 90255973 is about 9500.3143632198. The cubic root of 90255973 is about 448.5649312515.

The spelling of 90255973 in words is "ninety million, two hundred fifty-five thousand, nine hundred seventy-three".