1393389 has 8 divisors (see below), whose sum is σ = 2064320. Its totient is φ = 928908.

The previous prime is 1393387. The next prime is 1393397. The reversal of 1393389 is 9833931.

It is not a de Polignac number, because 1393389 - 2¹ = 1393387 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1393387) 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 7 ways as a sum of consecutive naturals, for example, 25777 + ... + 25830.

It is an arithmetic number, because the mean of its divisors is an integer number (258040).

2^1393389 is an apocalyptic number.

It is an amenable number.

1393389 is a deficient number, since it is larger than the sum of its proper divisors (670931).

1393389 is an equidigital number, since it uses as much as digits as its factorization.

1393389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51616 (or 51610 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 1393389 is about 1180.4189934087. The cubic root of 1393389 is about 111.6925293429.

The spelling of 1393389 in words is "one million, three hundred ninety-three thousand, three hundred eighty-nine".