91145311 has 2 divisors, whose sum is σ = 91145312. Its totient is φ = 91145310.

The previous prime is 91145293. The next prime is 91145317. The reversal of 91145311 is 11354119.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 91145311 - 2⁹ = 91144799 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91145317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45572655 + 45572656.

It is an arithmetic number, because the mean of its divisors is an integer number (45572656).

Almost surely, 2^91145311 is an apocalyptic number.

91145311 is a deficient number, since it is larger than the sum of its proper divisors (1).

91145311 is an equidigital number, since it uses as much as digits as its factorization.

91145311 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 91145311 is about 9547.0053419908. The cubic root of 91145311 is about 450.0334312611.

The spelling of 91145311 in words is "ninety-one million, one hundred forty-five thousand, three hundred eleven".