1138839139 has 4 divisors (see below), whose sum is σ = 1142726256. Its totient is φ = 1134952024.

The previous prime is 1138839137. The next prime is 1138839151. The reversal of 1138839139 is 9319388311.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9319388311 = 48383 ⋅192617.

It is a cyclic number.

It is not a de Polignac number, because 1138839139 - 2¹ = 1138839137 is a prime.

It is a super-2 number, since 2×1138839139² = 2593909169036522642, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1138839137) 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, 1943119 + ... + 1943704.

It is an arithmetic number, because the mean of its divisors is an integer number (285681564).

Almost surely, 2^1138839139 is an apocalyptic number.

1138839139 is a deficient number, since it is larger than the sum of its proper divisors (3887117).

1138839139 is an equidigital number, since it uses as much as digits as its factorization.

1138839139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3887116.

The product of its digits is 139968, while the sum is 46.

The square root of 1138839139 is about 33746.6907859126. The cubic root of 1138839139 is about 1044.2892197310.

The spelling of 1138839139 in words is "one billion, one hundred thirty-eight million, eight hundred thirty-nine thousand, one hundred thirty-nine".