1399393 has 2 divisors, whose sum is σ = 1399394. Its totient is φ = 1399392.

The previous prime is 1399381. The next prime is 1399399. The reversal of 1399393 is 3939931.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 795664 + 603729 = 892^2 + 777^2 .

It is an emirp because it is prime and its reverse (3939931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1399393 - 2⁵ = 1399361 is a prime.

It is not a weakly prime, because it can be changed into another prime (1399399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699696 + 699697.

It is an arithmetic number, because the mean of its divisors is an integer number (699697).

2^1399393 is an apocalyptic number.

It is an amenable number.

1399393 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399393 is an equidigital number, since it uses as much as digits as its factorization.

1399393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19683, while the sum is 37.

The square root of 1399393 is about 1182.9594244943. The cubic root of 1399393 is about 111.8527241522.

The spelling of 1399393 in words is "one million, three hundred ninety-nine thousand, three hundred ninety-three".