90839959 has 16 divisors (see below), whose sum is σ = 111440448. Its totient is φ = 72271872.

The previous prime is 90839953. The next prime is 90840017. The reversal of 90839959 is 95993809.

It is a cyclic number.

It is not a de Polignac number, because 90839959 - 2⁵ = 90839927 is a prime.

It is a super-2 number, since 2×90839959² = 16503796302243362, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90839953) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3459 + ... + 13915.

It is an arithmetic number, because the mean of its divisors is an integer number (6965028).

Almost surely, 2^90839959 is an apocalyptic number.

90839959 is a deficient number, since it is larger than the sum of its proper divisors (20600489).

90839959 is a wasteful number, since it uses less digits than its factorization.

90839959 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10554.

The product of its (nonzero) digits is 787320, while the sum is 52.

The square root of 90839959 is about 9530.9998950792. Note that the first 3 decimals coincide. The cubic root of 90839959 is about 449.5303066298.

The spelling of 90839959 in words is "ninety million, eight hundred thirty-nine thousand, nine hundred fifty-nine".