90403839 has 12 divisors (see below), whose sum is σ = 134113096. Its totient is φ = 58640112.

The previous prime is 90403829. The next prime is 90403847. The reversal of 90403839 is 93830409.

It is not a de Polignac number, because 90403839 - 2²⁰ = 89355263 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90403829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 135409 + ... + 136074.

Almost surely, 2^90403839 is an apocalyptic number.

90403839 is a deficient number, since it is larger than the sum of its proper divisors (43709257).

90403839 is a wasteful number, since it uses less digits than its factorization.

90403839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271526 (or 271523 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 90403839 is about 9508.0933419903. The cubic root of 90403839 is about 448.8097583120.

The spelling of 90403839 in words is "ninety million, four hundred three thousand, eight hundred thirty-nine".