89774809 has 2 divisors, whose sum is σ = 89774810. Its totient is φ = 89774808.

The previous prime is 89774779. The next prime is 89774827. The reversal of 89774809 is 90847798.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61387225 + 28387584 = 7835^2 + 5328^2 .

It is a cyclic number.

It is not a de Polignac number, because 89774809 - 2¹⁹ = 89250521 is a prime.

It is not a weakly prime, because it can be changed into another prime (89774899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44887404 + 44887405.

It is an arithmetic number, because the mean of its divisors is an integer number (44887405).

Almost surely, 2^89774809 is an apocalyptic number.

It is an amenable number.

89774809 is a deficient number, since it is larger than the sum of its proper divisors (1).

89774809 is an equidigital number, since it uses as much as digits as its factorization.

89774809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1016064, while the sum is 52.

The square root of 89774809 is about 9474.9569392161. The cubic root of 89774809 is about 447.7663950710.

The spelling of 89774809 in words is "eighty-nine million, seven hundred seventy-four thousand, eight hundred nine".