1393365973 has 2 divisors, whose sum is σ = 1393365974. Its totient is φ = 1393365972.

The previous prime is 1393365949. The next prime is 1393365977. The reversal of 1393365973 is 3795633931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1364711364 + 28654609 = 36942^2 + 5353^2 .

It is an emirp because it is prime and its reverse (3795633931) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1393365973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1393365977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696682986 + 696682987.

It is an arithmetic number, because the mean of its divisors is an integer number (696682987).

Almost surely, 2^1393365973 is an apocalyptic number.

It is an amenable number.

1393365973 is a deficient number, since it is larger than the sum of its proper divisors (1).

1393365973 is an equidigital number, since it uses as much as digits as its factorization.

1393365973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1377810, while the sum is 49.

The square root of 1393365973 is about 37327.8176833310. The cubic root of 1393365973 is about 1116.9191406648.

The spelling of 1393365973 in words is "one billion, three hundred ninety-three million, three hundred sixty-five thousand, nine hundred seventy-three".