91587967 has 2 divisors, whose sum is σ = 91587968. Its totient is φ = 91587966.

The previous prime is 91587929. The next prime is 91587983. The reversal of 91587967 is 76978519.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91587967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91587367) 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, 45793983 + 45793984.

It is an arithmetic number, because the mean of its divisors is an integer number (45793984).

Almost surely, 2^91587967 is an apocalyptic number.

91587967 is a deficient number, since it is larger than the sum of its proper divisors (1).

91587967 is an equidigital number, since it uses as much as digits as its factorization.

91587967 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 91587967 is about 9570.1602389929. The cubic root of 91587967 is about 450.7607986173.

The spelling of 91587967 in words is "ninety-one million, five hundred eighty-seven thousand, nine hundred sixty-seven".