89958989 has 2 divisors, whose sum is σ = 89958990. Its totient is φ = 89958988.

The previous prime is 89958971. The next prime is 89958997. The reversal of 89958989 is 98985998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45630025 + 44328964 = 6755^2 + 6658^2 .

It is a cyclic number.

It is not a de Polignac number, because 89958989 - 2⁸ = 89958733 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89958919) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44979494 + 44979495.

It is an arithmetic number, because the mean of its divisors is an integer number (44979495).

Almost surely, 2^89958989 is an apocalyptic number.

It is an amenable number.

89958989 is a deficient number, since it is larger than the sum of its proper divisors (1).

89958989 is an equidigital number, since it uses as much as digits as its factorization.

89958989 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16796160, while the sum is 65.

The square root of 89958989 is about 9484.6712647303. The cubic root of 89958989 is about 448.0723950953.

The spelling of 89958989 in words is "eighty-nine million, nine hundred fifty-eight thousand, nine hundred eighty-nine".