87317137 has 2 divisors, whose sum is σ = 87317138. Its totient is φ = 87317136.

The previous prime is 87317101. The next prime is 87317143. The reversal of 87317137 is 73171378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58844241 + 28472896 = 7671^2 + 5336^2 .

It is a cyclic number.

It is not a de Polignac number, because 87317137 - 2²³ = 78928529 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 87317096 and 87317105.

It is not a weakly prime, because it can be changed into another prime (87317537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43658568 + 43658569.

It is an arithmetic number, because the mean of its divisors is an integer number (43658569).

Almost surely, 2^87317137 is an apocalyptic number.

It is an amenable number.

87317137 is a deficient number, since it is larger than the sum of its proper divisors (1).

87317137 is an equidigital number, since it uses as much as digits as its factorization.

87317137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24696, while the sum is 37.

The square root of 87317137 is about 9344.3639162867. The cubic root of 87317137 is about 443.6425189138.

The spelling of 87317137 in words is "eighty-seven million, three hundred seventeen thousand, one hundred thirty-seven".