91566967 has 2 divisors, whose sum is σ = 91566968. Its totient is φ = 91566966.

The previous prime is 91566961. The next prime is 91566977. The reversal of 91566967 is 76966519.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91566967 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91566967.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91566961) 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, 45783483 + 45783484.

It is an arithmetic number, because the mean of its divisors is an integer number (45783484).

Almost surely, 2^91566967 is an apocalyptic number.

91566967 is a deficient number, since it is larger than the sum of its proper divisors (1).

91566967 is an equidigital number, since it uses as much as digits as its factorization.

91566967 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 612360, while the sum is 49.

The square root of 91566967 is about 9569.0630157816. The cubic root of 91566967 is about 450.7263446723.

The spelling of 91566967 in words is "ninety-one million, five hundred sixty-six thousand, nine hundred sixty-seven".