91360109 has 2 divisors, whose sum is σ = 91360110. Its totient is φ = 91360108.

The previous prime is 91360099. The next prime is 91360153. The reversal of 91360109 is 90106319.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91202500 + 157609 = 9550^2 + 397^2 .

It is an emirp because it is prime and its reverse (90106319) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91360109 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91360169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45680054 + 45680055.

It is an arithmetic number, because the mean of its divisors is an integer number (45680055).

Almost surely, 2^91360109 is an apocalyptic number.

It is an amenable number.

91360109 is a deficient number, since it is larger than the sum of its proper divisors (1).

91360109 is an equidigital number, since it uses as much as digits as its factorization.

91360109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1458, while the sum is 29.

The square root of 91360109 is about 9558.2482181622. The cubic root of 91360109 is about 450.3866783374.

The spelling of 91360109 in words is "ninety-one million, three hundred sixty thousand, one hundred nine".