90493839 has 24 divisors (see below), whose sum is σ = 138810672. Its totient is φ = 56613120.

The previous prime is 90493817. The next prime is 90493841. The reversal of 90493839 is 93839409.

It is not a de Polignac number, because 90493839 - 2⁵ = 90493807 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 90493794 and 90493803.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90493849) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 69892 + ... + 71174.

It is an arithmetic number, because the mean of its divisors is an integer number (5783778).

Almost surely, 2^90493839 is an apocalyptic number.

90493839 is a deficient number, since it is larger than the sum of its proper divisors (48316833).

90493839 is a wasteful number, since it uses less digits than its factorization.

90493839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767 (or 1764 counting only the distinct ones).

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

The square root of 90493839 is about 9512.8249747381. The cubic root of 90493839 is about 448.9586438828.

The spelling of 90493839 in words is "ninety million, four hundred ninety-three thousand, eight hundred thirty-nine".