90670831 has 16 divisors (see below), whose sum is σ = 99070560. Its totient is φ = 82684800.

The previous prime is 90670829. The next prime is 90670841. The reversal of 90670831 is 13807609.

It is a cyclic number.

It is not a de Polignac number, because 90670831 - 2¹ = 90670829 is a prime.

It is a super-2 number, since 2×90670831² = 16442399188461122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90670841) 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 15 ways as a sum of consecutive naturals, for example, 70365 + ... + 71641.

It is an arithmetic number, because the mean of its divisors is an integer number (6191910).

Almost surely, 2^90670831 is an apocalyptic number.

90670831 is a deficient number, since it is larger than the sum of its proper divisors (8399729).

90670831 is a wasteful number, since it uses less digits than its factorization.

90670831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1434.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 90670831 is about 9522.1232401182. The cubic root of 90670831 is about 449.2511512336.

The spelling of 90670831 in words is "ninety million, six hundred seventy thousand, eight hundred thirty-one".