1389347399 has 16 divisors (see below), whose sum is σ = 1594512000. Its totient is φ = 1198804320.

The previous prime is 1389347387. The next prime is 1389347411. The reversal of 1389347399 is 9937439831.

It is an interprime number because it is at equal distance from previous prime (1389347387) and next prime (1389347411).

It is not a de Polignac number, because 1389347399 - 2⁸ = 1389347143 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 (1389347369) 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, 18089 + ... + 55730.

It is an arithmetic number, because the mean of its divisors is an integer number (99657000).

Almost surely, 2^1389347399 is an apocalyptic number.

1389347399 is a deficient number, since it is larger than the sum of its proper divisors (205164601).

1389347399 is a wasteful number, since it uses less digits than its factorization.

1389347399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73918.

The product of its digits is 4408992, while the sum is 56.

The square root of 1389347399 is about 37273.9506760418. The cubic root of 1389347399 is about 1115.8443466726.

The spelling of 1389347399 in words is "one billion, three hundred eighty-nine million, three hundred forty-seven thousand, three hundred ninety-nine".