87659717 has 2 divisors, whose sum is σ = 87659718. Its totient is φ = 87659716.

The previous prime is 87659707. The next prime is 87659729. The reversal of 87659717 is 71795678.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86136961 + 1522756 = 9281^2 + 1234^2 .

It is a cyclic number.

It is not a de Polignac number, because 87659717 - 2⁸ = 87659461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87659707) 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, 43829858 + 43829859.

It is an arithmetic number, because the mean of its divisors is an integer number (43829859).

Almost surely, 2^87659717 is an apocalyptic number.

It is an amenable number.

87659717 is a deficient number, since it is larger than the sum of its proper divisors (1).

87659717 is an equidigital number, since it uses as much as digits as its factorization.

87659717 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 740880, while the sum is 50.

The square root of 87659717 is about 9362.6768074093. The cubic root of 87659717 is about 444.2219573763.

The spelling of 87659717 in words is "eighty-seven million, six hundred fifty-nine thousand, seven hundred seventeen".