311141197 has 2 divisors, whose sum is σ = 311141198. Its totient is φ = 311141196.

The previous prime is 311141189. The next prime is 311141219. The reversal of 311141197 is 791141113.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284731876 + 26409321 = 16874^2 + 5139^2 .

It is a cyclic number.

It is not a de Polignac number, because 311141197 - 2³ = 311141189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311141137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155570598 + 155570599.

It is an arithmetic number, because the mean of its divisors is an integer number (155570599).

Almost surely, 2^311141197 is an apocalyptic number.

It is an amenable number.

311141197 is a deficient number, since it is larger than the sum of its proper divisors (1).

311141197 is an equidigital number, since it uses as much as digits as its factorization.

311141197 is an evil number, because the sum of its binary digits is even.

The product of its digits is 756, while the sum is 28.

The square root of 311141197 is about 17639.1949079316. The cubic root of 311141197 is about 677.6194127829.

The spelling of 311141197 in words is "three hundred eleven million, one hundred forty-one thousand, one hundred ninety-seven".