1380939839 has 4 divisors (see below), whose sum is σ = 1382764824. Its totient is φ = 1379114856.

The previous prime is 1380939827. The next prime is 1380939851. The reversal of 1380939839 is 9389390831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9389390831 = 47 ⋅199774273.

It is an interprime number because it is at equal distance from previous prime (1380939827) and next prime (1380939851).

It is a cyclic number.

It is not a de Polignac number, because 1380939839 - 2⁴ = 1380939823 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 (1380939739) 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, 911357 + ... + 912870.

It is an arithmetic number, because the mean of its divisors is an integer number (345691206).

Almost surely, 2^1380939839 is an apocalyptic number.

1380939839 is a deficient number, since it is larger than the sum of its proper divisors (1824985).

1380939839 is an equidigital number, since it uses as much as digits as its factorization.

1380939839 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1824984.

The product of its (nonzero) digits is 1259712, while the sum is 53.

The square root of 1380939839 is about 37160.9988966928. The cubic root of 1380939839 is about 1113.5889673686.

The spelling of 1380939839 in words is "one billion, three hundred eighty million, nine hundred thirty-nine thousand, eight hundred thirty-nine".