90164873 has 2 divisors, whose sum is σ = 90164874. Its totient is φ = 90164872.

The previous prime is 90164869. The next prime is 90164887. The reversal of 90164873 is 37846109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 82391929 + 7772944 = 9077^2 + 2788^2 .

It is a cyclic number.

It is not a de Polignac number, because 90164873 - 2² = 90164869 is a prime.

It is a super-2 number, since 2×90164873² = 16259408646212258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (90164843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45082436 + 45082437.

It is an arithmetic number, because the mean of its divisors is an integer number (45082437).

Almost surely, 2^90164873 is an apocalyptic number.

It is an amenable number.

90164873 is a deficient number, since it is larger than the sum of its proper divisors (1).

90164873 is an equidigital number, since it uses as much as digits as its factorization.

90164873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 90164873 is about 9495.5185745698. The cubic root of 90164873 is about 448.4139605534.

The spelling of 90164873 in words is "ninety million, one hundred sixty-four thousand, eight hundred seventy-three".