90451923 has 12 divisors (see below), whose sum is σ = 123232200. Its totient is φ = 59013952.

The previous prime is 90451909. The next prime is 90451927. The reversal of 90451923 is 32915409.

It is not a de Polignac number, because 90451923 - 2⁶ = 90451859 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90451927) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 198 + ... + 13451.

It is an arithmetic number, because the mean of its divisors is an integer number (10269350).

Almost surely, 2^90451923 is an apocalyptic number.

90451923 is a deficient number, since it is larger than the sum of its proper divisors (32780277).

90451923 is a wasteful number, since it uses less digits than its factorization.

90451923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13746 (or 13699 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 33.

The square root of 90451923 is about 9510.6215885188. The cubic root of 90451923 is about 448.8893151970.

The spelling of 90451923 in words is "ninety million, four hundred fifty-one thousand, nine hundred twenty-three".