1393889 has 8 divisors (see below), whose sum is σ = 1608768. Its totient is φ = 1182960.

The previous prime is 1393883. The next prime is 1393891. The reversal of 1393889 is 9883931.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1393889 - 2⁸ = 1393633 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1393883) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 182 + ... + 1679.

It is an arithmetic number, because the mean of its divisors is an integer number (201096).

2^1393889 is an apocalyptic number.

It is an amenable number.

1393889 is a deficient number, since it is larger than the sum of its proper divisors (214879).

1393889 is a wasteful number, since it uses less digits than its factorization.

1393889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1975.

The product of its digits is 46656, while the sum is 41.

The square root of 1393889 is about 1180.6307636175. The cubic root of 1393889 is about 111.7058875618.

The spelling of 1393889 in words is "one million, three hundred ninety-three thousand, eight hundred eighty-nine".