1313831947 has 2 divisors, whose sum is σ = 1313831948. Its totient is φ = 1313831946.

The previous prime is 1313831879. The next prime is 1313831951. The reversal of 1313831947 is 7491383131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1313831947 - 2⁷ = 1313831819 is a prime.

It is not a weakly prime, because it can be changed into another prime (1313831957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656915973 + 656915974.

It is an arithmetic number, because the mean of its divisors is an integer number (656915974).

Almost surely, 2^1313831947 is an apocalyptic number.

1313831947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313831947 is an equidigital number, since it uses as much as digits as its factorization.

1313831947 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54432, while the sum is 40.

The square root of 1313831947 is about 36246.8198191234. The cubic root of 1313831947 is about 1095.2500272102.

The spelling of 1313831947 in words is "one billion, three hundred thirteen million, eight hundred thirty-one thousand, nine hundred forty-seven".