311963393 has 16 divisors (see below), whose sum is σ = 364953600. Its totient is φ = 261105936.

The previous prime is 311963389. The next prime is 311963417. The reversal of 311963393 is 393369113.

It is a happy number.

It is not a de Polignac number, because 311963393 - 2² = 311963389 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (311963363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196280 + ... + 197862.

It is an arithmetic number, because the mean of its divisors is an integer number (22809600).

Almost surely, 2^311963393 is an apocalyptic number.

It is an amenable number.

311963393 is a deficient number, since it is larger than the sum of its proper divisors (52990207).

311963393 is a wasteful number, since it uses less digits than its factorization.

311963393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2236.

The product of its digits is 39366, while the sum is 38.

The square root of 311963393 is about 17662.4854706239. The cubic root of 311963393 is about 678.2157614804.

The spelling of 311963393 in words is "three hundred eleven million, nine hundred sixty-three thousand, three hundred ninety-three".