1393879 has 6 divisors (see below), whose sum is σ = 1426424. Its totient is φ = 1362060.

The previous prime is 1393871. The next prime is 1393883. The reversal of 1393879 is 9783931.

It is not a de Polignac number, because 1393879 - 2³ = 1393871 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393871) 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 in 5 ways as a sum of consecutive naturals, for example, 1894 + ... + 2524.

2^1393879 is an apocalyptic number.

1393879 is a deficient number, since it is larger than the sum of its proper divisors (32545).

1393879 is an frugal number, since it uses more digits than its factorization.

1393879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725 (or 678 counting only the distinct ones).

The product of its digits is 40824, while the sum is 40.

The square root of 1393879 is about 1180.6265285856. The cubic root of 1393879 is about 111.7056204288.

The spelling of 1393879 in words is "one million, three hundred ninety-three thousand, eight hundred seventy-nine".