87986317 has 2 divisors, whose sum is σ = 87986318. Its totient is φ = 87986316.

The previous prime is 87986279. The next prime is 87986417. The reversal of 87986317 is 71368978.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47803396 + 40182921 = 6914^2 + 6339^2 .

It is a cyclic number.

It is not a de Polignac number, because 87986317 - 2¹⁹ = 87462029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87986117) 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, 43993158 + 43993159.

It is an arithmetic number, because the mean of its divisors is an integer number (43993159).

Almost surely, 2^87986317 is an apocalyptic number.

It is an amenable number.

87986317 is a deficient number, since it is larger than the sum of its proper divisors (1).

87986317 is an equidigital number, since it uses as much as digits as its factorization.

87986317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 508032, while the sum is 49.

The square root of 87986317 is about 9380.1021849445. The cubic root of 87986317 is about 444.7729633435.

The spelling of 87986317 in words is "eighty-seven million, nine hundred eighty-six thousand, three hundred seventeen".