311683780913 has 4 divisors (see below), whose sum is σ = 311753810928. Its totient is φ = 311613750900.

The previous prime is 311683780909. The next prime is 311683780921. The reversal of 311683780913 is 319087386113.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 311683780913 - 2² = 311683780909 is a prime.

It is a super-2 number, since 2×311683780913² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (311683780943) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35008331 + ... + 35017232.

It is an arithmetic number, because the mean of its divisors is an integer number (77938452732).

Almost surely, 2^311683780913 is an apocalyptic number.

It is an amenable number.

311683780913 is a deficient number, since it is larger than the sum of its proper divisors (70030015).

311683780913 is an equidigital number, since it uses as much as digits as its factorization.

311683780913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70030014.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 311683780913 in words is "three hundred eleven billion, six hundred eighty-three million, seven hundred eighty thousand, nine hundred thirteen".