1393938593 has 2 divisors, whose sum is σ = 1393938594. Its totient is φ = 1393938592.

The previous prime is 1393938587. The next prime is 1393938607. The reversal of 1393938593 is 3958393931.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 917302369 + 476636224 = 30287^2 + 21832^2 .

It is an emirp because it is prime and its reverse (3958393931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1393938593 - 2¹⁰ = 1393937569 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (1393938193) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696969296 + 696969297.

It is an arithmetic number, because the mean of its divisors is an integer number (696969297).

Almost surely, 2^1393938593 is an apocalyptic number.

It is an amenable number.

1393938593 is a deficient number, since it is larger than the sum of its proper divisors (1).

1393938593 is an equidigital number, since it uses as much as digits as its factorization.

1393938593 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2361960, while the sum is 53.

The square root of 1393938593 is about 37335.4870465084. The cubic root of 1393938593 is about 1117.0721233599.

The spelling of 1393938593 in words is "one billion, three hundred ninety-three million, nine hundred thirty-eight thousand, five hundred ninety-three".