1139748205 has 4 divisors (see below), whose sum is σ = 1367697852. Its totient is φ = 911798560.

The previous prime is 1139748179. The next prime is 1139748209. The reversal of 1139748205 is 5028479311.

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

It can be written as a sum of positive squares in 2 ways, for example, as 709849449 + 429898756 = 26643^2 + 20734^2 .

It is not a de Polignac number, because 1139748205 - 2⁵ = 1139748173 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 (1139748209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 113974816 + ... + 113974825.

It is an arithmetic number, because the mean of its divisors is an integer number (341924463).

Almost surely, 2^1139748205 is an apocalyptic number.

It is an amenable number.

1139748205 is a deficient number, since it is larger than the sum of its proper divisors (227949647).

1139748205 is an equidigital number, since it uses as much as digits as its factorization.

1139748205 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227949646.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 1139748205 is about 33760.1570642081. The cubic root of 1139748205 is about 1044.5670100136.

The spelling of 1139748205 in words is "one billion, one hundred thirty-nine million, seven hundred forty-eight thousand, two hundred five".