311107397 has 2 divisors, whose sum is σ = 311107398. Its totient is φ = 311107396.

The previous prime is 311107393. The next prime is 311107439. The reversal of 311107397 is 793701113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 275095396 + 36012001 = 16586^2 + 6001^2 .

It is a cyclic number.

It is not a de Polignac number, because 311107397 - 2² = 311107393 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 (311107393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155553698 + 155553699.

It is an arithmetic number, because the mean of its divisors is an integer number (155553699).

Almost surely, 2^311107397 is an apocalyptic number.

It is an amenable number.

311107397 is a deficient number, since it is larger than the sum of its proper divisors (1).

311107397 is an equidigital number, since it uses as much as digits as its factorization.

311107397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3969, while the sum is 32.

The square root of 311107397 is about 17638.2367882960. The cubic root of 311107397 is about 677.5948747642.

The spelling of 311107397 in words is "three hundred eleven million, one hundred seven thousand, three hundred ninety-seven".