91245311 has 2 divisors, whose sum is σ = 91245312. Its totient is φ = 91245310.

The previous prime is 91245263. The next prime is 91245313. The reversal of 91245311 is 11354219.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91245311 is a prime.

Together with 91245313, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91245313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45622655 + 45622656.

It is an arithmetic number, because the mean of its divisors is an integer number (45622656).

Almost surely, 2^91245311 is an apocalyptic number.

91245311 is a deficient number, since it is larger than the sum of its proper divisors (1).

91245311 is an equidigital number, since it uses as much as digits as its factorization.

91245311 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1080, while the sum is 26.

The square root of 91245311 is about 9552.2411506410. The cubic root of 91245311 is about 450.1979557046.

The spelling of 91245311 in words is "ninety-one million, two hundred forty-five thousand, three hundred eleven".