311304013 has 2 divisors, whose sum is σ = 311304014. Its totient is φ = 311304012.

The previous prime is 311303987. The next prime is 311304029. The reversal of 311304013 is 310403113.

It is an a-pointer prime, because the next prime (311304029) can be obtained adding 311304013 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 310534884 + 769129 = 17622^2 + 877^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311304013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311304053) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155652006 + 155652007.

It is an arithmetic number, because the mean of its divisors is an integer number (155652007).

Almost surely, 2^311304013 is an apocalyptic number.

It is an amenable number.

311304013 is a deficient number, since it is larger than the sum of its proper divisors (1).

311304013 is an equidigital number, since it uses as much as digits as its factorization.

311304013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108, while the sum is 16.

The square root of 311304013 is about 17643.8094809483. The cubic root of 311304013 is about 677.7375885444.

Adding to 311304013 its reverse (310403113), we get a palindrome (621707126).

The spelling of 311304013 in words is "three hundred eleven million, three hundred four thousand, thirteen".