91115369 has 2 divisors, whose sum is σ = 91115370. Its totient is φ = 91115368.

The previous prime is 91115341. The next prime is 91115371. The reversal of 91115369 is 96351119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 88266025 + 2849344 = 9395^2 + 1688^2 .

It is a cyclic number.

It is not a de Polignac number, because 91115369 - 2²⁰ = 90066793 is a prime.

It is a super-2 number, since 2×91115369² = 16604020936012322, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 91115371, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (91115309) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45557684 + 45557685.

It is an arithmetic number, because the mean of its divisors is an integer number (45557685).

Almost surely, 2^91115369 is an apocalyptic number.

It is an amenable number.

91115369 is a deficient number, since it is larger than the sum of its proper divisors (1).

91115369 is an equidigital number, since it uses as much as digits as its factorization.

91115369 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7290, while the sum is 35.

The square root of 91115369 is about 9545.4370774732. The cubic root of 91115369 is about 449.9841459435.

The spelling of 91115369 in words is "ninety-one million, one hundred fifteen thousand, three hundred sixty-nine".