88765609 has 2 divisors, whose sum is σ = 88765610. Its totient is φ = 88765608.

The previous prime is 88765603. The next prime is 88765637. The reversal of 88765609 is 90656788.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87834384 + 931225 = 9372^2 + 965^2 .

It is a cyclic number.

It is not a de Polignac number, because 88765609 - 2²³ = 80377001 is a prime.

It is a super-2 number, since 2×88765609² = 15758666682281762, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (88765603) 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, 44382804 + 44382805.

It is an arithmetic number, because the mean of its divisors is an integer number (44382805).

Almost surely, 2^88765609 is an apocalyptic number.

It is an amenable number.

88765609 is a deficient number, since it is larger than the sum of its proper divisors (1).

88765609 is an equidigital number, since it uses as much as digits as its factorization.

88765609 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 88765609 is about 9421.5502439885. The cubic root of 88765609 is about 446.0822188841.

The spelling of 88765609 in words is "eighty-eight million, seven hundred sixty-five thousand, six hundred nine".