90511023 has 4 divisors (see below), whose sum is σ = 120681368. Its totient is φ = 60340680.

The previous prime is 90510997. The next prime is 90511027. The reversal of 90511023 is 32011509.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32011509 = 3 ⋅10670503.

It is a de Polignac number, because none of the positive numbers 2^k-90511023 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 (90511027) 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, 15085168 + ... + 15085173.

It is an arithmetic number, because the mean of its divisors is an integer number (30170342).

Almost surely, 2^90511023 is an apocalyptic number.

90511023 is a deficient number, since it is larger than the sum of its proper divisors (30170345).

90511023 is a wasteful number, since it uses less digits than its factorization.

90511023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30170344.

The product of its (nonzero) digits is 270, while the sum is 21.

The square root of 90511023 is about 9513.7281335973. The cubic root of 90511023 is about 448.9870598764.

The spelling of 90511023 in words is "ninety million, five hundred eleven thousand, twenty-three".