90397169 has 4 divisors (see below), whose sum is σ = 92602020. Its totient is φ = 88192320.

The previous prime is 90397163. The next prime is 90397183. The reversal of 90397169 is 96179309.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43296400 + 47100769 = 6580^2 + 6863^2 .

It is a cyclic number.

It is not a de Polignac number, because 90397169 - 2⁸ = 90396913 is a prime.

It is a super-2 number, since 2×90397169² = 16343296326429122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90397163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1102364 + ... + 1102445.

It is an arithmetic number, because the mean of its divisors is an integer number (23150505).

Almost surely, 2^90397169 is an apocalyptic number.

It is an amenable number.

90397169 is a deficient number, since it is larger than the sum of its proper divisors (2204851).

90397169 is a wasteful number, since it uses less digits than its factorization.

90397169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2204850.

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

The square root of 90397169 is about 9507.7425817068. The cubic root of 90397169 is about 448.7987203047.

The spelling of 90397169 in words is "ninety million, three hundred ninety-seven thousand, one hundred sixty-nine".