90892237 has 2 divisors, whose sum is σ = 90892238. Its totient is φ = 90892236.

The previous prime is 90892213. The next prime is 90892253. The reversal of 90892237 is 73229809.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48525156 + 42367081 = 6966^2 + 6509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90892237 is a prime.

It is a super-2 number, since 2×90892237² = 16522797493728338, 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 90892237.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90892337) 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, 45446118 + 45446119.

It is an arithmetic number, because the mean of its divisors is an integer number (45446119).

Almost surely, 2^90892237 is an apocalyptic number.

It is an amenable number.

90892237 is a deficient number, since it is larger than the sum of its proper divisors (1).

90892237 is an equidigital number, since it uses as much as digits as its factorization.

90892237 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 90892237 is about 9533.7420250393. The cubic root of 90892237 is about 449.6165243359.

The spelling of 90892237 in words is "ninety million, eight hundred ninety-two thousand, two hundred thirty-seven".