91322729 has 2 divisors, whose sum is σ = 91322730. Its totient is φ = 91322728.

The previous prime is 91322713. The next prime is 91322741. The reversal of 91322729 is 92722319.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80066704 + 11256025 = 8948^2 + 3355^2 .

It is a cyclic number.

It is not a de Polignac number, because 91322729 - 2⁴ = 91322713 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91322789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45661364 + 45661365.

It is an arithmetic number, because the mean of its divisors is an integer number (45661365).

Almost surely, 2^91322729 is an apocalyptic number.

It is an amenable number.

91322729 is a deficient number, since it is larger than the sum of its proper divisors (1).

91322729 is an equidigital number, since it uses as much as digits as its factorization.

91322729 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13608, while the sum is 35.

The square root of 91322729 is about 9556.2926388846. The cubic root of 91322729 is about 450.3252447029.

The spelling of 91322729 in words is "ninety-one million, three hundred twenty-two thousand, seven hundred twenty-nine".