89991137 has 2 divisors, whose sum is σ = 89991138. Its totient is φ = 89991136.

The previous prime is 89991133. The next prime is 89991169. The reversal of 89991137 is 73119998.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64144081 + 25847056 = 8009^2 + 5084^2 .

It is a cyclic number.

It is not a de Polignac number, because 89991137 - 2² = 89991133 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 89991091 and 89991100.

It is not a weakly prime, because it can be changed into another prime (89991133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44995568 + 44995569.

It is an arithmetic number, because the mean of its divisors is an integer number (44995569).

Almost surely, 2^89991137 is an apocalyptic number.

It is an amenable number.

89991137 is a deficient number, since it is larger than the sum of its proper divisors (1).

89991137 is an equidigital number, since it uses as much as digits as its factorization.

89991137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472, while the sum is 47.

The square root of 89991137 is about 9486.3658478893. The cubic root of 89991137 is about 448.1257635468.

The spelling of 89991137 in words is "eighty-nine million, nine hundred ninety-one thousand, one hundred thirty-seven".