1397389 has 8 divisors (see below), whose sum is σ = 1615680. Its totient is φ = 1183776.

The previous prime is 1397359. The next prime is 1397437. The reversal of 1397389 is 9837931.

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 1397389 - 2⁷ = 1397261 is a prime.

It is an Ulam number.

It is a Duffinian number.

1397389 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1397329) 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, 499 + ... + 1744.

It is an arithmetic number, because the mean of its divisors is an integer number (201960).

2^1397389 is an apocalyptic number.

It is an amenable number.

1397389 is a deficient number, since it is larger than the sum of its proper divisors (218291).

1397389 is an equidigital number, since it uses as much as digits as its factorization.

1397389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2339.

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

The square root of 1397389 is about 1182.1120928237. The cubic root of 1397389 is about 111.7993057668.

The spelling of 1397389 in words is "one million, three hundred ninety-seven thousand, three hundred eighty-nine".