89992181 has 2 divisors, whose sum is σ = 89992182. Its totient is φ = 89992180.

The previous prime is 89992159. The next prime is 89992187. The reversal of 89992181 is 18129998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59367025 + 30625156 = 7705^2 + 5534^2 .

It is a cyclic number.

It is not a de Polignac number, because 89992181 - 2⁶ = 89992117 is a prime.

It is a super-2 number, since 2×89992181² = 16197185282273522, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89992187) 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, 44996090 + 44996091.

It is an arithmetic number, because the mean of its divisors is an integer number (44996091).

Almost surely, 2^89992181 is an apocalyptic number.

It is an amenable number.

89992181 is a deficient number, since it is larger than the sum of its proper divisors (1).

89992181 is an equidigital number, since it uses as much as digits as its factorization.

89992181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 93312, while the sum is 47.

The square root of 89992181 is about 9486.4208740705. The cubic root of 89992181 is about 448.1274964637.

The spelling of 89992181 in words is "eighty-nine million, nine hundred ninety-two thousand, one hundred eighty-one".