87317953 has 2 divisors, whose sum is σ = 87317954. Its totient is φ = 87317952.

The previous prime is 87317921. The next prime is 87317969. The reversal of 87317953 is 35971378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87179569 + 138384 = 9337^2 + 372^2 .

It is a cyclic number.

It is not a de Polignac number, because 87317953 - 2⁵ = 87317921 is a prime.

It is a super-2 number, since 2×87317953² = 15248849832220418, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (87317903) 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, 43658976 + 43658977.

It is an arithmetic number, because the mean of its divisors is an integer number (43658977).

Almost surely, 2^87317953 is an apocalyptic number.

It is an amenable number.

87317953 is a deficient number, since it is larger than the sum of its proper divisors (1).

87317953 is an equidigital number, since it uses as much as digits as its factorization.

87317953 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 43.

The square root of 87317953 is about 9344.4075788677. The cubic root of 87317953 is about 443.6439008921.

The spelling of 87317953 in words is "eighty-seven million, three hundred seventeen thousand, nine hundred fifty-three".