311855699 has 2 divisors, whose sum is σ = 311855700. Its totient is φ = 311855698.

The previous prime is 311855671. The next prime is 311855711. The reversal of 311855699 is 996558113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311855699 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (311855639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155927849 + 155927850.

It is an arithmetic number, because the mean of its divisors is an integer number (155927850).

Almost surely, 2^311855699 is an apocalyptic number.

311855699 is a deficient number, since it is larger than the sum of its proper divisors (1).

311855699 is an equidigital number, since it uses as much as digits as its factorization.

311855699 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 291600, while the sum is 47.

The square root of 311855699 is about 17659.4365425401. The cubic root of 311855699 is about 678.1377094010.

The spelling of 311855699 in words is "three hundred eleven million, eight hundred fifty-five thousand, six hundred ninety-nine".