87316857 has 6 divisors (see below), whose sum is σ = 126124362. Its totient is φ = 58211232.

The previous prime is 87316849. The next prime is 87316861. The reversal of 87316857 is 75861378.

It can be written as a sum of positive squares in only one way, i.e., 61214976 + 26101881 = 7824^2 + 5109^2 .

It is not a de Polignac number, because 87316857 - 2³ = 87316849 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87316847) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4850928 + ... + 4850945.

It is an arithmetic number, because the mean of its divisors is an integer number (21020727).

Almost surely, 2^87316857 is an apocalyptic number.

It is an amenable number.

87316857 is a deficient number, since it is larger than the sum of its proper divisors (38807505).

87316857 is a wasteful number, since it uses less digits than its factorization.

87316857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9701879 (or 9701876 counting only the distinct ones).

The product of its digits is 282240, while the sum is 45.

The square root of 87316857 is about 9344.3489339814. The cubic root of 87316857 is about 443.6420447036.

The spelling of 87316857 in words is "eighty-seven million, three hundred sixteen thousand, eight hundred fifty-seven".