90380839 has 4 divisors (see below), whose sum is σ = 90400024. Its totient is φ = 90361656.

The previous prime is 90380803. The next prime is 90380887. The reversal of 90380839 is 93808309.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90380839 - 2¹⁷ = 90249767 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 (90380039) 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 3 ways as a sum of consecutive naturals, for example, 2884 + ... + 13750.

It is an arithmetic number, because the mean of its divisors is an integer number (22600006).

Almost surely, 2^90380839 is an apocalyptic number.

90380839 is a deficient number, since it is larger than the sum of its proper divisors (19185).

90380839 is a wasteful number, since it uses less digits than its factorization.

90380839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19184.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 90380839 is about 9506.8837691433. The cubic root of 90380839 is about 448.7716939257.

It can be divided in two parts, 90380 and 839, that added together give a palindrome (91219).

The spelling of 90380839 in words is "ninety million, three hundred eighty thousand, eight hundred thirty-nine".