91865167 has 2 divisors, whose sum is σ = 91865168. Its totient is φ = 91865166.

The previous prime is 91865159. The next prime is 91865203. The reversal of 91865167 is 76156819.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (76156819) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91865167 - 2³ = 91865159 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91865867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45932583 + 45932584.

It is an arithmetic number, because the mean of its divisors is an integer number (45932584).

Almost surely, 2^91865167 is an apocalyptic number.

91865167 is a deficient number, since it is larger than the sum of its proper divisors (1).

91865167 is an equidigital number, since it uses as much as digits as its factorization.

91865167 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 43.

The square root of 91865167 is about 9584.6318134814. The cubic root of 91865167 is about 451.2150979111.

The spelling of 91865167 in words is "ninety-one million, eight hundred sixty-five thousand, one hundred sixty-seven".