88790809 has 2 divisors, whose sum is σ = 88790810. Its totient is φ = 88790808.

The previous prime is 88790803. The next prime is 88790843. The reversal of 88790809 is 90809788.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59598400 + 29192409 = 7720^2 + 5403^2 .

It is a cyclic number.

It is not a de Polignac number, because 88790809 - 2⁵ = 88790777 is a prime.

It is not a weakly prime, because it can be changed into another prime (88790803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44395404 + 44395405.

It is an arithmetic number, because the mean of its divisors is an integer number (44395405).

Almost surely, 2^88790809 is an apocalyptic number.

It is an amenable number.

88790809 is a deficient number, since it is larger than the sum of its proper divisors (1).

88790809 is an equidigital number, since it uses as much as digits as its factorization.

88790809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 290304, while the sum is 49.

The square root of 88790809 is about 9422.8875086143. The cubic root of 88790809 is about 446.1244282053.

The spelling of 88790809 in words is "eighty-eight million, seven hundred ninety thousand, eight hundred nine".