311434397 has 2 divisors, whose sum is σ = 311434398. Its totient is φ = 311434396.

The previous prime is 311434379. The next prime is 311434411. The reversal of 311434397 is 793434113.

Together with previous prime (311434379) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220403716 + 91030681 = 14846^2 + 9541^2 .

It is a cyclic number.

It is not a de Polignac number, because 311434397 - 2¹⁰ = 311433373 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311434327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155717198 + 155717199.

It is an arithmetic number, because the mean of its divisors is an integer number (155717199).

Almost surely, 2^311434397 is an apocalyptic number.

It is an amenable number.

311434397 is a deficient number, since it is larger than the sum of its proper divisors (1).

311434397 is an equidigital number, since it uses as much as digits as its factorization.

311434397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27216, while the sum is 35.

The square root of 311434397 is about 17647.5039878165. The cubic root of 311434397 is about 677.8321946744.

The spelling of 311434397 in words is "three hundred eleven million, four hundred thirty-four thousand, three hundred ninety-seven".