311668013 has 4 divisors (see below), whose sum is σ = 313943100. Its totient is φ = 309392928.

The previous prime is 311668003. The next prime is 311668051. The reversal of 311668013 is 310866113.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 209294089 + 102373924 = 14467^2 + 10118^2 .

It is a cyclic number.

It is not a de Polignac number, because 311668013 - 2¹⁸ = 311405869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311668003) 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, 1137338 + ... + 1137611.

It is an arithmetic number, because the mean of its divisors is an integer number (78485775).

Almost surely, 2^311668013 is an apocalyptic number.

It is an amenable number.

311668013 is a deficient number, since it is larger than the sum of its proper divisors (2275087).

311668013 is a wasteful number, since it uses less digits than its factorization.

311668013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2275086.

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 311668013 is about 17654.1217000450. The cubic root of 311668013 is about 678.0016395281.

The spelling of 311668013 in words is "three hundred eleven million, six hundred sixty-eight thousand, thirteen".