1310399947 has 2 divisors, whose sum is σ = 1310399948. Its totient is φ = 1310399946.

The previous prime is 1310399929. The next prime is 1310400011. The reversal of 1310399947 is 7499930131.

It is a weak prime.

It is an emirp because it is prime and its reverse (7499930131) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1310399947 - 2⁷ = 1310399819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1310399897 and 1310399906.

It is not a weakly prime, because it can be changed into another prime (1310399917) 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, 655199973 + 655199974.

It is an arithmetic number, because the mean of its divisors is an integer number (655199974).

Almost surely, 2^1310399947 is an apocalyptic number.

1310399947 is a deficient number, since it is larger than the sum of its proper divisors (1).

1310399947 is an equidigital number, since it uses as much as digits as its factorization.

1310399947 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 183708, while the sum is 46.

The square root of 1310399947 is about 36199.4467775407. The cubic root of 1310399947 is about 1094.2955226239.

It can be divided in two parts, 13103 and 99947, that added together give a triangular number (113050 = T₄₇₅).

The spelling of 1310399947 in words is "one billion, three hundred ten million, three hundred ninety-nine thousand, nine hundred forty-seven".