87318017 has 2 divisors, whose sum is σ = 87318018. Its totient is φ = 87318016.

The previous prime is 87318013. The next prime is 87318029. The reversal of 87318017 is 71081378.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 80263681 + 7054336 = 8959^2 + 2656^2 .

It is a cyclic number.

It is not a de Polignac number, because 87318017 - 2² = 87318013 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87318013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43659008 + 43659009.

It is an arithmetic number, because the mean of its divisors is an integer number (43659009).

Almost surely, 2^87318017 is an apocalyptic number.

It is an amenable number.

87318017 is a deficient number, since it is larger than the sum of its proper divisors (1).

87318017 is an equidigital number, since it uses as much as digits as its factorization.

87318017 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 35.

The square root of 87318017 is about 9344.4110033752. The cubic root of 87318017 is about 443.6440092822.

The spelling of 87318017 in words is "eighty-seven million, three hundred eighteen thousand, seventeen".