88887809 has 2 divisors, whose sum is σ = 88887810. Its totient is φ = 88887808.

The previous prime is 88887791. The next prime is 88887817. The reversal of 88887809 is 90878888.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88887184 + 625 = 9428^2 + 25^2 .

It is a cyclic number.

It is not a de Polignac number, because 88887809 - 2²⁴ = 72110593 is a prime.

It is not a weakly prime, because it can be changed into another prime (88887829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44443904 + 44443905.

It is an arithmetic number, because the mean of its divisors is an integer number (44443905).

Almost surely, 2^88887809 is an apocalyptic number.

It is an amenable number.

88887809 is a deficient number, since it is larger than the sum of its proper divisors (1).

88887809 is an equidigital number, since it uses as much as digits as its factorization.

88887809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2064384, while the sum is 56.

The square root of 88887809 is about 9428.0331458900. The cubic root of 88887809 is about 446.2868260978.

The spelling of 88887809 in words is "eighty-eight million, eight hundred eighty-seven thousand, eight hundred nine".