311656847 has 2 divisors, whose sum is σ = 311656848. Its totient is φ = 311656846.

The previous prime is 311656789. The next prime is 311656861. The reversal of 311656847 is 748656113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311656847 - 2¹² = 311652751 is a prime.

It is equal to p_16849049 and since 311656847 and 16849049 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (311656897) 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, 155828423 + 155828424.

It is an arithmetic number, because the mean of its divisors is an integer number (155828424).

Almost surely, 2^311656847 is an apocalyptic number.

311656847 is a deficient number, since it is larger than the sum of its proper divisors (1).

311656847 is an equidigital number, since it uses as much as digits as its factorization.

311656847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 311656847 is about 17653.8054537825. The cubic root of 311656847 is about 677.9935426040.

The spelling of 311656847 in words is "three hundred eleven million, six hundred fifty-six thousand, eight hundred forty-seven".