1398385139 has 4 divisors (see below), whose sum is σ = 1405412400. Its totient is φ = 1391357880.

The previous prime is 1398385129. The next prime is 1398385147. The reversal of 1398385139 is 9315838931.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1398385139 - 2²⁴ = 1381607923 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1398385129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3513332 + ... + 3513729.

It is an arithmetic number, because the mean of its divisors is an integer number (351353100).

Almost surely, 2^1398385139 is an apocalyptic number.

1398385139 is a deficient number, since it is larger than the sum of its proper divisors (7027261).

1398385139 is an equidigital number, since it uses as much as digits as its factorization.

1398385139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7027260.

The product of its digits is 699840, while the sum is 50.

The square root of 1398385139 is about 37394.9881534946. The cubic root of 1398385139 is about 1118.2586510857.

The spelling of 1398385139 in words is "one billion, three hundred ninety-eight million, three hundred eighty-five thousand, one hundred thirty-nine".