1393939 has 2 divisors, whose sum is σ = 1393940. Its totient is φ = 1393938.

The previous prime is 1393937. The next prime is 1393957. The reversal of 1393939 is 9393931.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1393939 - 2¹ = 1393937 is a prime.

Together with 1393937, it forms a pair of twin primes.

It is a Chen prime.

1393939 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 1393898 and 1393907.

It is not a weakly prime, because it can be changed into another prime (1393933) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 696969 + 696970.

It is an arithmetic number, because the mean of its divisors is an integer number (696970).

2^1393939 is an apocalyptic number.

1393939 is a deficient number, since it is larger than the sum of its proper divisors (1).

1393939 is an equidigital number, since it uses as much as digits as its factorization.

1393939 is an odious number, because the sum of its binary digits is odd.

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

The square root of 1393939 is about 1180.6519385492. The cubic root of 1393939 is about 111.7072232080.

It can be divided in two parts, 1393 and 939, that added together give a palindrome (2332).

The spelling of 1393939 in words is "one million, three hundred ninety-three thousand, nine hundred thirty-nine".