311117903 has 2 divisors, whose sum is σ = 311117904. Its totient is φ = 311117902.

The previous prime is 311117899. The next prime is 311117909. The reversal of 311117903 is 309711113.

It is a weak prime.

It is an emirp because it is prime and its reverse (309711113) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 311117903 - 2² = 311117899 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311117909) 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, 155558951 + 155558952.

It is an arithmetic number, because the mean of its divisors is an integer number (155558952).

Almost surely, 2^311117903 is an apocalyptic number.

311117903 is a deficient number, since it is larger than the sum of its proper divisors (1).

311117903 is an equidigital number, since it uses as much as digits as its factorization.

311117903 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 567, while the sum is 26.

The square root of 311117903 is about 17638.5346046660. The cubic root of 311117903 is about 677.6025020677.

The spelling of 311117903 in words is "three hundred eleven million, one hundred seventeen thousand, nine hundred three".