311206797091 has 2 divisors, whose sum is σ = 311206797092. Its totient is φ = 311206797090.

The previous prime is 311206797053. The next prime is 311206797101. The reversal of 311206797091 is 190797602113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311206797091 - 2¹¹ = 311206795043 is a prime.

It is not a weakly prime, because it can be changed into another prime (311206797691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155603398545 + 155603398546.

It is an arithmetic number, because the mean of its divisors is an integer number (155603398546).

Almost surely, 2^311206797091 is an apocalyptic number.

311206797091 is a deficient number, since it is larger than the sum of its proper divisors (1).

311206797091 is an equidigital number, since it uses as much as digits as its factorization.

311206797091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142884, while the sum is 46.

The spelling of 311206797091 in words is "three hundred eleven billion, two hundred six million, seven hundred ninety-seven thousand, ninety-one".