87591967 has 2 divisors, whose sum is σ = 87591968. Its totient is φ = 87591966.

The previous prime is 87591953. The next prime is 87591983. The reversal of 87591967 is 76919578.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87591967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87591937) 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, 43795983 + 43795984.

It is an arithmetic number, because the mean of its divisors is an integer number (43795984).

Almost surely, 2^87591967 is an apocalyptic number.

87591967 is a deficient number, since it is larger than the sum of its proper divisors (1).

87591967 is an equidigital number, since it uses as much as digits as its factorization.

87591967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 952560, while the sum is 52.

The square root of 87591967 is about 9359.0580188393. The cubic root of 87591967 is about 444.1074852049.

The spelling of 87591967 in words is "eighty-seven million, five hundred ninety-one thousand, nine hundred sixty-seven".