311040091 has 2 divisors, whose sum is σ = 311040092. Its totient is φ = 311040090.

The previous prime is 311040073. The next prime is 311040157. The reversal of 311040091 is 190040113.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 311040091 - 2⁹ = 311039579 is a prime.

It is not a weakly prime, because it can be changed into another prime (311040011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155520045 + 155520046.

It is an arithmetic number, because the mean of its divisors is an integer number (155520046).

Almost surely, 2^311040091 is an apocalyptic number.

311040091 is a deficient number, since it is larger than the sum of its proper divisors (1).

311040091 is an equidigital number, since it uses as much as digits as its factorization.

311040091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 311040091 is about 17636.3287279411. The cubic root of 311040091 is about 677.5460068702.

The spelling of 311040091 in words is "three hundred eleven million, forty thousand, ninety-one".