311149799 has 2 divisors, whose sum is σ = 311149800. Its totient is φ = 311149798.

The previous prime is 311149781. The next prime is 311149801. The reversal of 311149799 is 997941113.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311149799 is a prime.

Together with 311149801, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311149199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155574899 + 155574900.

It is an arithmetic number, because the mean of its divisors is an integer number (155574900).

Almost surely, 2^311149799 is an apocalyptic number.

311149799 is a deficient number, since it is larger than the sum of its proper divisors (1).

311149799 is an equidigital number, since it uses as much as digits as its factorization.

311149799 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61236, while the sum is 44.

The square root of 311149799 is about 17639.4387382365. The cubic root of 311149799 is about 677.6256573524.

The spelling of 311149799 in words is "three hundred eleven million, one hundred forty-nine thousand, seven hundred ninety-nine".