89197187 has 2 divisors, whose sum is σ = 89197188. Its totient is φ = 89197186.

The previous prime is 89197177. The next prime is 89197193. The reversal of 89197187 is 78179198.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89197187 - 2⁶ = 89197123 is a prime.

It is a super-2 number, since 2×89197187² = 15912276337425938, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (89197177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44598593 + 44598594.

It is an arithmetic number, because the mean of its divisors is an integer number (44598594).

Almost surely, 2^89197187 is an apocalyptic number.

89197187 is a deficient number, since it is larger than the sum of its proper divisors (1).

89197187 is an equidigital number, since it uses as much as digits as its factorization.

89197187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 50.

The square root of 89197187 is about 9444.4262398517. The cubic root of 89197187 is about 446.8040003067.

The spelling of 89197187 in words is "eighty-nine million, one hundred ninety-seven thousand, one hundred eighty-seven".