311908097 has 2 divisors, whose sum is σ = 311908098. Its totient is φ = 311908096.

The previous prime is 311908087. The next prime is 311908109. The reversal of 311908097 is 790809113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 308388721 + 3519376 = 17561^2 + 1876^2 .

It is a cyclic number.

It is not a de Polignac number, because 311908097 - 2¹² = 311904001 is a prime.

It is a super-2 number, since 2×311908097² = 194573321948322818, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 311908097.

It is not a weakly prime, because it can be changed into another prime (311908057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155954048 + 155954049.

It is an arithmetic number, because the mean of its divisors is an integer number (155954049).

Almost surely, 2^311908097 is an apocalyptic number.

It is an amenable number.

311908097 is a deficient number, since it is larger than the sum of its proper divisors (1).

311908097 is an equidigital number, since it uses as much as digits as its factorization.

311908097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 38.

The square root of 311908097 is about 17660.9200496463. The cubic root of 311908097 is about 678.1756875106.

The spelling of 311908097 in words is "three hundred eleven million, nine hundred eight thousand, ninety-seven".