311441947 has 2 divisors, whose sum is σ = 311441948. Its totient is φ = 311441946.

The previous prime is 311441927. The next prime is 311441951. The reversal of 311441947 is 749144113.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (749144113) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-311441947 is a prime.

It is not a weakly prime, because it can be changed into another prime (311441927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 155720973 + 155720974.

It is an arithmetic number, because the mean of its divisors is an integer number (155720974).

Almost surely, 2^311441947 is an apocalyptic number.

311441947 is a deficient number, since it is larger than the sum of its proper divisors (1).

311441947 is an equidigital number, since it uses as much as digits as its factorization.

311441947 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 34.

The square root of 311441947 is about 17647.7178977906. The cubic root of 311441947 is about 677.8376721166.

The spelling of 311441947 in words is "three hundred eleven million, four hundred forty-one thousand, nine hundred forty-seven".