91181411 has 2 divisors, whose sum is σ = 91181412. Its totient is φ = 91181410.

The previous prime is 91181381. The next prime is 91181413. The reversal of 91181411 is 11418119.

It is a strong prime.

It is an emirp because it is prime and its reverse (11418119) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 91181411 - 2²² = 86987107 is a prime.

It is a Sophie Germain prime.

Together with 91181413, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (91181413) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45590705 + 45590706.

It is an arithmetic number, because the mean of its divisors is an integer number (45590706).

Almost surely, 2^91181411 is an apocalyptic number.

91181411 is a deficient number, since it is larger than the sum of its proper divisors (1).

91181411 is an equidigital number, since it uses as much as digits as its factorization.

91181411 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 288, while the sum is 26.

The square root of 91181411 is about 9548.8958000389. The cubic root of 91181411 is about 450.0928384586.

The spelling of 91181411 in words is "ninety-one million, one hundred eighty-one thousand, four hundred eleven".