311388377 has 2 divisors, whose sum is σ = 311388378. Its totient is φ = 311388376.

The previous prime is 311388349. The next prime is 311388401. The reversal of 311388377 is 773883113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 199261456 + 112126921 = 14116^2 + 10589^2 .

It is a cyclic number.

It is not a de Polignac number, because 311388377 - 2¹⁴ = 311371993 is a prime.

It is not a weakly prime, because it can be changed into another prime (311388277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155694188 + 155694189.

It is an arithmetic number, because the mean of its divisors is an integer number (155694189).

Almost surely, 2^311388377 is an apocalyptic number.

It is an amenable number.

311388377 is a deficient number, since it is larger than the sum of its proper divisors (1).

311388377 is an equidigital number, since it uses as much as digits as its factorization.

311388377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84672, while the sum is 41.

The square root of 311388377 is about 17646.2000725369. The cubic root of 311388377 is about 677.7988057547.

The spelling of 311388377 in words is "three hundred eleven million, three hundred eighty-eight thousand, three hundred seventy-seven".