311949189 has 12 divisors (see below), whose sum is σ = 452134956. Its totient is φ = 207254592.

The previous prime is 311949179. The next prime is 311949217. The reversal of 311949189 is 981949113.

It can be written as a sum of positive squares in 2 ways, for example, as 143209089 + 168740100 = 11967^2 + 12990^2 .

It is not a de Polignac number, because 311949189 - 2⁴ = 311949173 is a prime.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (311949139) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 56512 + ... + 61785.

It is an arithmetic number, because the mean of its divisors is an integer number (37677913).

Almost surely, 2^311949189 is an apocalyptic number.

It is an amenable number.

311949189 is a deficient number, since it is larger than the sum of its proper divisors (140185767).

311949189 is a wasteful number, since it uses less digits than its factorization.

311949189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118596 (or 118593 counting only the distinct ones).

The product of its digits is 69984, while the sum is 45.

The square root of 311949189 is about 17662.0833708824. The cubic root of 311949189 is about 678.2054680474.

The spelling of 311949189 in words is "three hundred eleven million, nine hundred forty-nine thousand, one hundred eighty-nine".