90120233 has 16 divisors (see below), whose sum is σ = 108272640. Its totient is φ = 73337616.

The previous prime is 90120223. The next prime is 90120301. The reversal of 90120233 is 33202109.

It is not a de Polignac number, because 90120233 - 2¹⁰ = 90119209 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90120223) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20366 + ... + 24392.

It is an arithmetic number, because the mean of its divisors is an integer number (6767040).

Almost surely, 2^90120233 is an apocalyptic number.

It is an amenable number.

90120233 is a deficient number, since it is larger than the sum of its proper divisors (18152407).

90120233 is a wasteful number, since it uses less digits than its factorization.

90120233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4196.

The product of its (nonzero) digits is 324, while the sum is 20.

The square root of 90120233 is about 9493.1677010364. The cubic root of 90120233 is about 448.3399461289.

The spelling of 90120233 in words is "ninety million, one hundred twenty thousand, two hundred thirty-three".