90136331 has 2 divisors, whose sum is σ = 90136332. Its totient is φ = 90136330.

The previous prime is 90136309. The next prime is 90136337. The reversal of 90136331 is 13363109.

It is a strong prime.

It is an emirp because it is prime and its reverse (13363109) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90136331 - 2¹⁴ = 90119947 is a prime.

It is a super-2 number, since 2×90136331² = 16249116332283122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90136331.

It is not a weakly prime, because it can be changed into another prime (90136337) 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 as a sum of consecutive naturals, namely, 45068165 + 45068166.

It is an arithmetic number, because the mean of its divisors is an integer number (45068166).

Almost surely, 2^90136331 is an apocalyptic number.

90136331 is a deficient number, since it is larger than the sum of its proper divisors (1).

90136331 is an equidigital number, since it uses as much as digits as its factorization.

90136331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1458, while the sum is 26.

The square root of 90136331 is about 9494.0155361154. The cubic root of 90136331 is about 448.3666399005.

The spelling of 90136331 in words is "ninety million, one hundred thirty-six thousand, three hundred thirty-one".