311110609 has 2 divisors, whose sum is σ = 311110610. Its totient is φ = 311110608.

The previous prime is 311110607. The next prime is 311110619. The reversal of 311110609 is 906011113.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 213160000 + 97950609 = 14600^2 + 9897^2 .

It is a cyclic number.

It is not a de Polignac number, because 311110609 - 2¹ = 311110607 is a prime.

It is a super-2 number, since 2×311110609² = 193579622064701762, which contains 22 as substring.

Together with 311110607, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 311110609.

It is not a weakly prime, because it can be changed into another prime (311110607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155555304 + 155555305.

It is an arithmetic number, because the mean of its divisors is an integer number (155555305).

Almost surely, 2^311110609 is an apocalyptic number.

It is an amenable number.

311110609 is a deficient number, since it is larger than the sum of its proper divisors (1).

311110609 is an equidigital number, since it uses as much as digits as its factorization.

311110609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 311110609 is about 17638.3278402461. The cubic root of 311110609 is about 677.5972066783.

The spelling of 311110609 in words is "three hundred eleven million, one hundred ten thousand, six hundred nine".