1393704797 has 2 divisors, whose sum is σ = 1393704798. Its totient is φ = 1393704796.

The previous prime is 1393704751. The next prime is 1393704821. The reversal of 1393704797 is 7974073931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1301333476 + 92371321 = 36074^2 + 9611^2 .

It is an emirp because it is prime and its reverse (7974073931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1393704797 - 2⁶ = 1393704733 is a prime.

It is a super-2 number, since 2×1393704797² = 3884826122361622418, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1393704097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696852398 + 696852399.

It is an arithmetic number, because the mean of its divisors is an integer number (696852399).

Almost surely, 2^1393704797 is an apocalyptic number.

It is an amenable number.

1393704797 is a deficient number, since it is larger than the sum of its proper divisors (1).

1393704797 is an equidigital number, since it uses as much as digits as its factorization.

1393704797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1000188, while the sum is 50.

The square root of 1393704797 is about 37332.3558994072. The cubic root of 1393704797 is about 1117.0096668552.

The spelling of 1393704797 in words is "one billion, three hundred ninety-three million, seven hundred four thousand, seven hundred ninety-seven".