90430823 has 24 divisors (see below), whose sum is σ = 111697200. Its totient is φ = 72793728.

The previous prime is 90430811. The next prime is 90430859. The reversal of 90430823 is 32803409.

It is not a de Polignac number, because 90430823 - 2⁸ = 90430567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90430883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127193 + ... + 127901.

It is an arithmetic number, because the mean of its divisors is an integer number (4654050).

Almost surely, 2^90430823 is an apocalyptic number.

90430823 is a deficient number, since it is larger than the sum of its proper divisors (21266377).

90430823 is a wasteful number, since it uses less digits than its factorization.

90430823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 879 (or 872 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 29.

The square root of 90430823 is about 9509.5122377544. The cubic root of 90430823 is about 448.8544078826.

The spelling of 90430823 in words is "ninety million, four hundred thirty thousand, eight hundred twenty-three".