89879591 has 2 divisors, whose sum is σ = 89879592. Its totient is φ = 89879590.

The previous prime is 89879507. The next prime is 89879627. The reversal of 89879591 is 19597898.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 89879591 - 2¹⁰ = 89878567 is a prime.

It is a Sophie Germain 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 (89809591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44939795 + 44939796.

It is an arithmetic number, because the mean of its divisors is an integer number (44939796).

Almost surely, 2^89879591 is an apocalyptic number.

89879591 is a deficient number, since it is larger than the sum of its proper divisors (1).

89879591 is an equidigital number, since it uses as much as digits as its factorization.

89879591 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1632960, while the sum is 56.

The square root of 89879591 is about 9480.4847449906. The cubic root of 89879591 is about 447.9405330693.

The spelling of 89879591 in words is "eighty-nine million, eight hundred seventy-nine thousand, five hundred ninety-one".