311091113 has 2 divisors, whose sum is σ = 311091114. Its totient is φ = 311091112.

The previous prime is 311091101. The next prime is 311091119. The reversal of 311091113 is 311190113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264127504 + 46963609 = 16252^2 + 6853^2 .

It is a cyclic number.

It is not a de Polignac number, because 311091113 - 2⁴ = 311091097 is a prime.

It is not a weakly prime, because it can be changed into another prime (311091119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155545556 + 155545557.

It is an arithmetic number, because the mean of its divisors is an integer number (155545557).

Almost surely, 2^311091113 is an apocalyptic number.

It is an amenable number.

311091113 is a deficient number, since it is larger than the sum of its proper divisors (1).

311091113 is an equidigital number, since it uses as much as digits as its factorization.

311091113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 20.

The square root of 311091113 is about 17637.7751714892. The cubic root of 311091113 is about 677.5830523222.

The spelling of 311091113 in words is "three hundred eleven million, ninety-one thousand, one hundred thirteen".