90937169 has 2 divisors, whose sum is σ = 90937170. Its totient is φ = 90937168.

The previous prime is 90937163. The next prime is 90937177. The reversal of 90937169 is 96173909.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84860944 + 6076225 = 9212^2 + 2465^2 .

It is a cyclic number.

It is not a de Polignac number, because 90937169 - 2⁸ = 90936913 is a prime.

It is a super-2 number, since 2×90937169² = 16539137411469122, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (90937163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45468584 + 45468585.

It is an arithmetic number, because the mean of its divisors is an integer number (45468585).

Almost surely, 2^90937169 is an apocalyptic number.

It is an amenable number.

90937169 is a deficient number, since it is larger than the sum of its proper divisors (1).

90937169 is an equidigital number, since it uses as much as digits as its factorization.

90937169 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 91854, while the sum is 44.

The square root of 90937169 is about 9536.0982062896. The cubic root of 90937169 is about 449.6906004885.

The spelling of 90937169 in words is "ninety million, nine hundred thirty-seven thousand, one hundred sixty-nine".