311963109 has 16 divisors (see below), whose sum is σ = 439423680. Its totient is φ = 196318080.

The previous prime is 311963087. The next prime is 311963117. The reversal of 311963109 is 901369113.

It is a happy number.

It is not a de Polignac number, because 311963109 - 2²³ = 303574501 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311963109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311963129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6279 + ... + 25755.

It is an arithmetic number, because the mean of its divisors is an integer number (27463980).

Almost surely, 2^311963109 is an apocalyptic number.

It is an amenable number.

311963109 is a deficient number, since it is larger than the sum of its proper divisors (127460571).

311963109 is a wasteful number, since it uses less digits than its factorization.

311963109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19780.

The product of its (nonzero) digits is 4374, while the sum is 33.

The square root of 311963109 is about 17662.4774309835. The cubic root of 311963109 is about 678.2155556728.

The spelling of 311963109 in words is "three hundred eleven million, nine hundred sixty-three thousand, one hundred nine".