90943839 has 48 divisors (see below), whose sum is σ = 156499200. Its totient is φ = 49811328.

The previous prime is 90943807. The next prime is 90943843. The reversal of 90943839 is 93834909.

It is not a de Polignac number, because 90943839 - 2⁵ = 90943807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90943794 and 90943803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90943859) 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 47 ways as a sum of consecutive naturals, for example, 159547 + ... + 160115.

It is an arithmetic number, because the mean of its divisors is an integer number (3260400).

Almost surely, 2^90943839 is an apocalyptic number.

90943839 is a deficient number, since it is larger than the sum of its proper divisors (65555361).

90943839 is a wasteful number, since it uses less digits than its factorization.

90943839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 684 (or 681 counting only the distinct ones).

The product of its (nonzero) digits is 209952, while the sum is 45.

The square root of 90943839 is about 9536.4479236244. The cubic root of 90943839 is about 449.7015947570.

The spelling of 90943839 in words is "ninety million, nine hundred forty-three thousand, eight hundred thirty-nine".