1139182809 has 4 divisors (see below), whose sum is σ = 1518910416. Its totient is φ = 759455204.

The previous prime is 1139182777. The next prime is 1139182813. The reversal of 1139182809 is 9082819311.

1139182809 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1139182809 - 2⁵ = 1139182777 is a prime.

It is a super-2 number, since 2×1139182809² = 2595474944642260962, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1139182819) 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, 189863799 + ... + 189863804.

It is an arithmetic number, because the mean of its divisors is an integer number (379727604).

Almost surely, 2^1139182809 is an apocalyptic number.

It is an amenable number.

1139182809 is a deficient number, since it is larger than the sum of its proper divisors (379727607).

1139182809 is an equidigital number, since it uses as much as digits as its factorization.

1139182809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 379727606.

The product of its (nonzero) digits is 31104, while the sum is 42.

The square root of 1139182809 is about 33751.7823084945. The cubic root of 1139182809 is about 1044.3942549869.

The spelling of 1139182809 in words is "one billion, one hundred thirty-nine million, one hundred eighty-two thousand, eight hundred nine".