90475923 has 4 divisors (see below), whose sum is σ = 120634568. Its totient is φ = 60317280.

The previous prime is 90475919. The next prime is 90475933. The reversal of 90475923 is 32957409.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32957409 = 3 ⋅10985803.

It is not a de Polignac number, because 90475923 - 2² = 90475919 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90475933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15079318 + ... + 15079323.

It is an arithmetic number, because the mean of its divisors is an integer number (30158642).

Almost surely, 2^90475923 is an apocalyptic number.

90475923 is a deficient number, since it is larger than the sum of its proper divisors (30158645).

90475923 is a wasteful number, since it uses less digits than its factorization.

90475923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30158644.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 90475923 is about 9511.8832520169. The cubic root of 90475923 is about 448.9290136007.

The spelling of 90475923 in words is "ninety million, four hundred seventy-five thousand, nine hundred twenty-three".