91115413 has 2 divisors, whose sum is σ = 91115414. Its totient is φ = 91115412.

The previous prime is 91115371. The next prime is 91115429. The reversal of 91115413 is 31451119.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70257924 + 20857489 = 8382^2 + 4567^2 .

It is a cyclic number.

It is not a de Polignac number, because 91115413 - 2²⁵ = 57560981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91115483) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45557706 + 45557707.

It is an arithmetic number, because the mean of its divisors is an integer number (45557707).

Almost surely, 2^91115413 is an apocalyptic number.

It is an amenable number.

91115413 is a deficient number, since it is larger than the sum of its proper divisors (1).

91115413 is an equidigital number, since it uses as much as digits as its factorization.

91115413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 25.

The square root of 91115413 is about 9545.4393822390. The cubic root of 91115413 is about 449.9842183766.

The spelling of 91115413 in words is "ninety-one million, one hundred fifteen thousand, four hundred thirteen".