311461643 has 2 divisors, whose sum is σ = 311461644. Its totient is φ = 311461642.

The previous prime is 311461583. The next prime is 311461651. The reversal of 311461643 is 346164113.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 311461643 - 2⁸ = 311461387 is a prime.

It is not a weakly prime, because it can be changed into another prime (311461343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155730821 + 155730822.

It is an arithmetic number, because the mean of its divisors is an integer number (155730822).

Almost surely, 2^311461643 is an apocalyptic number.

311461643 is a deficient number, since it is larger than the sum of its proper divisors (1).

311461643 is an equidigital number, since it uses as much as digits as its factorization.

311461643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 29.

The square root of 311461643 is about 17648.2759214604. The cubic root of 311461643 is about 677.8519609318.

The spelling of 311461643 in words is "three hundred eleven million, four hundred sixty-one thousand, six hundred forty-three".