311908117 has 4 divisors (see below), whose sum is σ = 312369516. Its totient is φ = 311446720.

The previous prime is 311908109. The next prime is 311908139. The reversal of 311908117 is 711809113.

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 294259716 + 17648401 = 17154^2 + 4201^2 .

It is a cyclic number.

It is not a de Polignac number, because 311908117 - 2³ = 311908109 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 (311908147) 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, 229684 + ... + 231037.

It is an arithmetic number, because the mean of its divisors is an integer number (78092379).

Almost surely, 2^311908117 is an apocalyptic number.

It is an amenable number.

311908117 is a deficient number, since it is larger than the sum of its proper divisors (461399).

311908117 is an equidigital number, since it uses as much as digits as its factorization.

311908117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 461398.

The product of its (nonzero) digits is 1512, while the sum is 31.

The square root of 311908117 is about 17660.9206158682. The cubic root of 311908117 is about 678.1757020058.

The spelling of 311908117 in words is "three hundred eleven million, nine hundred eight thousand, one hundred seventeen".