311434809 has 32 divisors (see below), whose sum is σ = 490583040. Its totient is φ = 172020672.

The previous prime is 311434769. The next prime is 311434819. The reversal of 311434809 is 908434113.

It is not a de Polignac number, because 311434809 - 2⁹ = 311434297 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 311434809.

It is not an unprimeable number, because it can be changed into a prime (311434819) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 125422 + ... + 127880.

It is an arithmetic number, because the mean of its divisors is an integer number (15330720).

Almost surely, 2^311434809 is an apocalyptic number.

It is an amenable number.

311434809 is a deficient number, since it is larger than the sum of its proper divisors (179148231).

311434809 is a wasteful number, since it uses less digits than its factorization.

311434809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2669.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 311434809 is about 17647.5156608515. The cubic root of 311434809 is about 677.8324935781.

The spelling of 311434809 in words is "three hundred eleven million, four hundred thirty-four thousand, eight hundred nine".