1147819189 has 12 divisors (see below), whose sum is σ = 1268968428. Its totient is φ = 1037421440.

The previous prime is 1147819187. The next prime is 1147819199. The reversal of 1147819189 is 9819187411.

It can be written as a sum of positive squares in 2 ways, for example, as 846519025 + 301300164 = 29095^2 + 17358^2 .

It is not a de Polignac number, because 1147819189 - 2¹ = 1147819187 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 (1147819187) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6484 + ... + 48349.

It is an arithmetic number, because the mean of its divisors is an integer number (105747369).

Almost surely, 2^1147819189 is an apocalyptic number.

It is an amenable number.

1147819189 is a deficient number, since it is larger than the sum of its proper divisors (121149239).

1147819189 is a wasteful number, since it uses less digits than its factorization.

1147819189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55028 (or 55017 counting only the distinct ones).

The product of its digits is 145152, while the sum is 49.

The square root of 1147819189 is about 33879.4803531577. The cubic root of 1147819189 is about 1047.0268694906.

The spelling of 1147819189 in words is "one billion, one hundred forty-seven million, eight hundred nineteen thousand, one hundred eighty-nine".