87317983 has 2 divisors, whose sum is σ = 87317984. Its totient is φ = 87317982.

The previous prime is 87317981. The next prime is 87318013. The reversal of 87317983 is 38971378.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87317983 - 2¹ = 87317981 is a prime.

Together with 87317981, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87317981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43658991 + 43658992.

It is an arithmetic number, because the mean of its divisors is an integer number (43658992).

Almost surely, 2^87317983 is an apocalyptic number.

87317983 is a deficient number, since it is larger than the sum of its proper divisors (1).

87317983 is an equidigital number, since it uses as much as digits as its factorization.

87317983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 254016, while the sum is 46.

The square root of 87317983 is about 9344.4091841058. The cubic root of 87317983 is about 443.6439517000.

The spelling of 87317983 in words is "eighty-seven million, three hundred seventeen thousand, nine hundred eighty-three".