1138281139 has 4 divisors (see below), whose sum is σ = 1146970440. Its totient is φ = 1129591840.

The previous prime is 1138281107. The next prime is 1138281143. The reversal of 1138281139 is 9311828311.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9311828311 = 521 ⋅17872991.

It is a cyclic number.

It is not a de Polignac number, because 1138281139 - 2⁵ = 1138281107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1138281098 and 1138281107.

It is not an unprimeable number, because it can be changed into a prime (1138281149) 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, 4344454 + ... + 4344715.

It is an arithmetic number, because the mean of its divisors is an integer number (286742610).

Almost surely, 2^1138281139 is an apocalyptic number.

1138281139 is a deficient number, since it is larger than the sum of its proper divisors (8689301).

1138281139 is an equidigital number, since it uses as much as digits as its factorization.

1138281139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8689300.

The product of its digits is 10368, while the sum is 37.

The square root of 1138281139 is about 33738.4222956557. The cubic root of 1138281139 is about 1044.1186341578.

The spelling of 1138281139 in words is "one billion, one hundred thirty-eight million, two hundred eighty-one thousand, one hundred thirty-nine".