1399943 has 2 divisors, whose sum is σ = 1399944. Its totient is φ = 1399942.

The previous prime is 1399919. The next prime is 1399963. The reversal of 1399943 is 3499931.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1399943 - 2⁸ = 1399687 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 1399897 and 1399906.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1399913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 699971 + 699972.

It is an arithmetic number, because the mean of its divisors is an integer number (699972).

2^1399943 is an apocalyptic number.

1399943 is a deficient number, since it is larger than the sum of its proper divisors (1).

1399943 is an equidigital number, since it uses as much as digits as its factorization.

1399943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26244, while the sum is 38.

The square root of 1399943 is about 1183.1918694785. The cubic root of 1399943 is about 111.8673759668.

The spelling of 1399943 in words is "one million, three hundred ninety-nine thousand, nine hundred forty-three".