90563823 has 24 divisors (see below), whose sum is σ = 157372800. Its totient is φ = 49026384.

The previous prime is 90563821. The next prime is 90563831. The reversal of 90563823 is 32836509.

90563823 is a `hidden beast` number, since 90 + 563 + 8 + 2 + 3 = 666.

It is not a de Polignac number, because 90563823 - 2¹ = 90563821 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90563821) 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, 36633 + ... + 39026.

It is an arithmetic number, because the mean of its divisors is an integer number (6557200).

Almost surely, 2^90563823 is an apocalyptic number.

90563823 is a deficient number, since it is larger than the sum of its proper divisors (66808977).

90563823 is a wasteful number, since it uses less digits than its factorization.

90563823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75691 (or 75688 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 90563823 is about 9516.5026664211. The cubic root of 90563823 is about 449.0743490916.

The spelling of 90563823 in words is "ninety million, five hundred sixty-three thousand, eight hundred twenty-three".