90839231 has 16 divisors (see below), whose sum is σ = 107327808. Its totient is φ = 75264000.

The previous prime is 90839137. The next prime is 90839233. The reversal of 90839231 is 13293809.

It is not a de Polignac number, because 90839231 - 2¹⁸ = 90577087 is a prime.

It is a super-2 number, since 2×90839231² = 16503531777342722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90839191 and 90839200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90839233) 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, 31031 + ... + 33831.

It is an arithmetic number, because the mean of its divisors is an integer number (6707988).

Almost surely, 2^90839231 is an apocalyptic number.

90839231 is a deficient number, since it is larger than the sum of its proper divisors (16488577).

90839231 is a wasteful number, since it uses less digits than its factorization.

90839231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2962.

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 90839231 is about 9530.9617038366. The cubic root of 90839231 is about 449.5291057672.

The spelling of 90839231 in words is "ninety million, eight hundred thirty-nine thousand, two hundred thirty-one".