91349729 has 2 divisors, whose sum is σ = 91349730. Its totient is φ = 91349728.

The previous prime is 91349723. The next prime is 91349737. The reversal of 91349729 is 92794319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49773025 + 41576704 = 7055^2 + 6448^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91349729 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 91349729.

It is not a weakly prime, because it can be changed into another prime (91349723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45674864 + 45674865.

It is an arithmetic number, because the mean of its divisors is an integer number (45674865).

Almost surely, 2^91349729 is an apocalyptic number.

It is an amenable number.

91349729 is a deficient number, since it is larger than the sum of its proper divisors (1).

91349729 is an equidigital number, since it uses as much as digits as its factorization.

91349729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 122472, while the sum is 44.

The square root of 91349729 is about 9557.7052162117. The cubic root of 91349729 is about 450.3696205981.

The spelling of 91349729 in words is "ninety-one million, three hundred forty-nine thousand, seven hundred twenty-nine".