90322831 has 2 divisors, whose sum is σ = 90322832. Its totient is φ = 90322830.

The previous prime is 90322829. The next prime is 90322847. The reversal of 90322831 is 13822309.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90322831 - 2¹ = 90322829 is a prime.

It is a super-2 number, since 2×90322831² = 16316427599709122, which contains 22 as substring.

Together with 90322829, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 90322831.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90322031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45161415 + 45161416.

It is an arithmetic number, because the mean of its divisors is an integer number (45161416).

Almost surely, 2^90322831 is an apocalyptic number.

90322831 is a deficient number, since it is larger than the sum of its proper divisors (1).

90322831 is an equidigital number, since it uses as much as digits as its factorization.

90322831 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 90322831 is about 9503.8324374959. The cubic root of 90322831 is about 448.6756635427.

The spelling of 90322831 in words is "ninety million, three hundred twenty-two thousand, eight hundred thirty-one".