1396939 has 2 divisors, whose sum is σ = 1396940. Its totient is φ = 1396938.

The previous prime is 1396909. The next prime is 1396949. The reversal of 1396939 is 9396931.

It is a strong prime.

It is an emirp because it is prime and its reverse (9396931) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1396939 - 2⁹ = 1396427 is a prime.

It is not a weakly prime, because it can be changed into another prime (1396909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 698469 + 698470.

It is an arithmetic number, because the mean of its divisors is an integer number (698470).

2^1396939 is an apocalyptic number.

1396939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1396939 is an equidigital number, since it uses as much as digits as its factorization.

1396939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 39366, while the sum is 40.

The square root of 1396939 is about 1181.9217402180. The cubic root of 1396939 is about 111.7873035997.

The spelling of 1396939 in words is "one million, three hundred ninety-six thousand, nine hundred thirty-nine".