89997181 has 2 divisors, whose sum is σ = 89997182. Its totient is φ = 89997180.

The previous prime is 89997169. The next prime is 89997211. The reversal of 89997181 is 18179998.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64545156 + 25452025 = 8034^2 + 5045^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89997181 is a prime.

It is a super-2 number, since 2×89997181² = 16198985175893522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89992181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44998590 + 44998591.

It is an arithmetic number, because the mean of its divisors is an integer number (44998591).

Almost surely, 2^89997181 is an apocalyptic number.

It is an amenable number.

89997181 is a deficient number, since it is larger than the sum of its proper divisors (1).

89997181 is an equidigital number, since it uses as much as digits as its factorization.

89997181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 52.

The square root of 89997181 is about 9486.6844049963. The cubic root of 89997181 is about 448.1357956884.

The spelling of 89997181 in words is "eighty-nine million, nine hundred ninety-seven thousand, one hundred eighty-one".