1394788313 has 2 divisors, whose sum is σ = 1394788314. Its totient is φ = 1394788312.

The previous prime is 1394788279. The next prime is 1394788319. The reversal of 1394788313 is 3138874931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1072693504 + 322094809 = 32752^2 + 17947^2 .

It is a cyclic number.

It is not a de Polignac number, because 1394788313 - 2¹² = 1394784217 is a prime.

It is not a weakly prime, because it can be changed into another prime (1394788319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 697394156 + 697394157.

It is an arithmetic number, because the mean of its divisors is an integer number (697394157).

Almost surely, 2^1394788313 is an apocalyptic number.

It is an amenable number.

1394788313 is a deficient number, since it is larger than the sum of its proper divisors (1).

1394788313 is an equidigital number, since it uses as much as digits as its factorization.

1394788313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 1394788313 is about 37346.8648349497. The cubic root of 1394788313 is about 1117.2990596404.

The spelling of 1394788313 in words is "one billion, three hundred ninety-four million, seven hundred eighty-eight thousand, three hundred thirteen".