91366291 has 2 divisors, whose sum is σ = 91366292. Its totient is φ = 91366290.

The previous prime is 91366241. The next prime is 91366321. The reversal of 91366291 is 19266319.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91366291 - 2⁹ = 91365779 is a prime.

It is a super-3 number, since 3×91366291³ (a number of 25 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 91366291.

It is not a weakly prime, because it can be changed into another prime (91366241) 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, 45683145 + 45683146.

It is an arithmetic number, because the mean of its divisors is an integer number (45683146).

Almost surely, 2^91366291 is an apocalyptic number.

91366291 is a deficient number, since it is larger than the sum of its proper divisors (1).

91366291 is an equidigital number, since it uses as much as digits as its factorization.

91366291 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17496, while the sum is 37.

The square root of 91366291 is about 9558.5715983090. The cubic root of 91366291 is about 450.3968367741.

The spelling of 91366291 in words is "ninety-one million, three hundred sixty-six thousand, two hundred ninety-one".