1399259713 has 2 divisors, whose sum is σ = 1399259714. Its totient is φ = 1399259712.

The previous prime is 1399259669. The next prime is 1399259761. The reversal of 1399259713 is 3179529931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 720761409 + 678498304 = 26847^2 + 26048^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1399259713 is a prime.

It is not a weakly prime, because it can be changed into another prime (1399239713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699629856 + 699629857.

It is an arithmetic number, because the mean of its divisors is an integer number (699629857).

Almost surely, 2^1399259713 is an apocalyptic number.

It is an amenable number.

1399259713 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399259713 is an equidigital number, since it uses as much as digits as its factorization.

1399259713 is an evil number, because the sum of its binary digits is even.

The product of its digits is 459270, while the sum is 49.

The square root of 1399259713 is about 37406.6800585136. The cubic root of 1399259713 is about 1118.4917285355.

The spelling of 1399259713 in words is "one billion, three hundred ninety-nine million, two hundred fifty-nine thousand, seven hundred thirteen".