1389399 has 16 divisors (see below), whose sum is σ = 2052864. Its totient is φ = 828800.

The previous prime is 1389383. The next prime is 1389403. The reversal of 1389399 is 9939831.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 1389399 - 2⁴ = 1389383 is a prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 1389399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1389319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2047 + ... + 2639.

It is an arithmetic number, because the mean of its divisors is an integer number (128304).

2^1389399 is an apocalyptic number.

1389399 is a deficient number, since it is larger than the sum of its proper divisors (663465).

1389399 is a wasteful number, since it uses less digits than its factorization.

1389399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678.

The product of its digits is 52488, while the sum is 42.

The square root of 1389399 is about 1178.7277039249. The cubic root of 1389399 is about 111.5858160825.

The spelling of 1389399 in words is "one million, three hundred eighty-nine thousand, three hundred ninety-nine".