311366808397 has 2 divisors, whose sum is σ = 311366808398. Its totient is φ = 311366808396.

The previous prime is 311366808349. The next prime is 311366808407. The reversal of 311366808397 is 793808663113.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 279432760996 + 31934047401 = 528614^2 + 178701^2 .

It is an emirp because it is prime and its reverse (793808663113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311366808397 - 2³¹ = 309219324749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311366808317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155683404198 + 155683404199.

It is an arithmetic number, because the mean of its divisors is an integer number (155683404199).

Almost surely, 2^311366808397 is an apocalyptic number.

It is an amenable number.

311366808397 is a deficient number, since it is larger than the sum of its proper divisors (1).

311366808397 is an equidigital number, since it uses as much as digits as its factorization.

311366808397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3919104, while the sum is 55.

The spelling of 311366808397 in words is "three hundred eleven billion, three hundred sixty-six million, eight hundred eight thousand, three hundred ninety-seven".