311400279883393 has 2 divisors, whose sum is σ = 311400279883394. Its totient is φ = 311400279883392.

The previous prime is 311400279883369. The next prime is 311400279883411. The reversal of 311400279883393 is 393388972004113.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192444785767809 + 118955494115584 = 13872447^2 + 10906672^2 .

It is a cyclic number.

It is not a de Polignac number, because 311400279883393 - 2²⁹ = 311399743012481 is a prime.

It is a super-2 number, since 2×311400279883393² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (311400279883313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155700139941696 + 155700139941697.

It is an arithmetic number, because the mean of its divisors is an integer number (155700139941697).

Almost surely, 2^{311400279883393} is an apocalyptic number.

It is an amenable number.

311400279883393 is a deficient number, since it is larger than the sum of its proper divisors (1).

311400279883393 is an equidigital number, since it uses as much as digits as its factorization.

311400279883393 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23514624, while the sum is 61.

The spelling of 311400279883393 in words is "three hundred eleven trillion, four hundred billion, two hundred seventy-nine million, eight hundred eighty-three thousand, three hundred ninety-three".