89915519 has 2 divisors, whose sum is σ = 89915520. Its totient is φ = 89915518.

The previous prime is 89915503. The next prime is 89915521. The reversal of 89915519 is 91551998.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89915519 - 2⁴ = 89915503 is a prime.

It is a super-2 number, since 2×89915519² = 16169601114078722, which contains 22 as substring.

Together with 89915521, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89915549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44957759 + 44957760.

It is an arithmetic number, because the mean of its divisors is an integer number (44957760).

Almost surely, 2^89915519 is an apocalyptic number.

89915519 is a deficient number, since it is larger than the sum of its proper divisors (1).

89915519 is an equidigital number, since it uses as much as digits as its factorization.

89915519 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 47.

The square root of 89915519 is about 9482.3793954893. The cubic root of 89915519 is about 448.0002109241. Note that the first 3 decimals are identical.

The spelling of 89915519 in words is "eighty-nine million, nine hundred fifteen thousand, five hundred nineteen".