89909513 has 2 divisors, whose sum is σ = 89909514. Its totient is φ = 89909512.

The previous prime is 89909497. The next prime is 89909527. The reversal of 89909513 is 31590998.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89264704 + 644809 = 9448^2 + 803^2 .

It is a cyclic number.

It is not a de Polignac number, because 89909513 - 2⁴ = 89909497 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (89909213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44954756 + 44954757.

It is an arithmetic number, because the mean of its divisors is an integer number (44954757).

Almost surely, 2^89909513 is an apocalyptic number.

It is an amenable number.

89909513 is a deficient number, since it is larger than the sum of its proper divisors (1).

89909513 is an equidigital number, since it uses as much as digits as its factorization.

89909513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 87480, while the sum is 44.

The square root of 89909513 is about 9482.0626975358. The cubic root of 89909513 is about 447.9902358230.

The spelling of 89909513 in words is "eighty-nine million, nine hundred nine thousand, five hundred thirteen".