1393959913 has 2 divisors, whose sum is σ = 1393959914. Its totient is φ = 1393959912.

The previous prime is 1393959899. The next prime is 1393959949. The reversal of 1393959913 is 3199593931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 740492944 + 653466969 = 27212^2 + 25563^2 .

It is a cyclic number.

It is not a de Polignac number, because 1393959913 - 2⁵ = 1393959881 is a prime.

It is not a weakly prime, because it can be changed into another prime (1393959953) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696979956 + 696979957.

It is an arithmetic number, because the mean of its divisors is an integer number (696979957).

Almost surely, 2^1393959913 is an apocalyptic number.

It is an amenable number.

1393959913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1393959913 is an equidigital number, since it uses as much as digits as its factorization.

1393959913 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 885735, while the sum is 52.

The square root of 1393959913 is about 37335.7725646598. The cubic root of 1393959913 is about 1117.0778184593.

The spelling of 1393959913 in words is "one billion, three hundred ninety-three million, nine hundred fifty-nine thousand, nine hundred thirteen".