90381123 has 16 divisors (see below), whose sum is σ = 153026560. Its totient is φ = 51646248.

The previous prime is 90381103. The next prime is 90381167. The reversal of 90381123 is 32118309.

It is not a de Polignac number, because 90381123 - 2⁵ = 90381091 is a prime.

It is a super-2 number, since 2×90381123² = 16337494789482258, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90381103) 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 15 ways as a sum of consecutive naturals, for example, 238915 + ... + 239292.

It is an arithmetic number, because the mean of its divisors is an integer number (9564160).

Almost surely, 2^90381123 is an apocalyptic number.

90381123 is a deficient number, since it is larger than the sum of its proper divisors (62645437).

90381123 is a wasteful number, since it uses less digits than its factorization.

90381123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478223 (or 478217 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 90381123 is about 9506.8987056768. The cubic root of 90381123 is about 448.7721639775.

The spelling of 90381123 in words is "ninety million, three hundred eighty-one thousand, one hundred twenty-three".