87316693 has 2 divisors, whose sum is σ = 87316694. Its totient is φ = 87316692.

The previous prime is 87316657. The next prime is 87316711. The reversal of 87316693 is 39661378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86545809 + 770884 = 9303^2 + 878^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87316693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87316613) 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, 43658346 + 43658347.

It is an arithmetic number, because the mean of its divisors is an integer number (43658347).

Almost surely, 2^87316693 is an apocalyptic number.

It is an amenable number.

87316693 is a deficient number, since it is larger than the sum of its proper divisors (1).

87316693 is an equidigital number, since it uses as much as digits as its factorization.

87316693 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 43.

The square root of 87316693 is about 9344.3401586201. The cubic root of 87316693 is about 443.6417669514.

The spelling of 87316693 in words is "eighty-seven million, three hundred sixteen thousand, six hundred ninety-three".