1389139 has 2 divisors, whose sum is σ = 1389140. Its totient is φ = 1389138.

The previous prime is 1389133. The next prime is 1389149. The reversal of 1389139 is 9319831.

It is a weak prime.

It is an emirp because it is prime and its reverse (9319831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1389139 - 2⁵ = 1389107 is a prime.

It is a super-2 number, since 2×1389139² = 3859414322642, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1389133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694569 + 694570.

It is an arithmetic number, because the mean of its divisors is an integer number (694570).

2^1389139 is an apocalyptic number.

1389139 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389139 is an equidigital number, since it uses as much as digits as its factorization.

1389139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5832, while the sum is 34.

The square root of 1389139 is about 1178.6174103584. The cubic root of 1389139 is about 111.5788552498.

The spelling of 1389139 in words is "one million, three hundred eighty-nine thousand, one hundred thirty-nine".