1147861189 has 4 divisors (see below), whose sum is σ = 1164028320. Its totient is φ = 1131694060.

The previous prime is 1147861163. The next prime is 1147861201. The reversal of 1147861189 is 9811687411.

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 1147861189 - 2⁵ = 1147861157 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 (1147861289) 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, 8083459 + ... + 8083600.

It is an arithmetic number, because the mean of its divisors is an integer number (291007080).

Almost surely, 2^1147861189 is an apocalyptic number.

It is an amenable number.

1147861189 is a deficient number, since it is larger than the sum of its proper divisors (16167131).

1147861189 is an equidigital number, since it uses as much as digits as its factorization.

1147861189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16167130.

The product of its digits is 96768, while the sum is 46.

The square root of 1147861189 is about 33880.1001917055. The cubic root of 1147861189 is about 1047.0396399666.

The spelling of 1147861189 in words is "one billion, one hundred forty-seven million, eight hundred sixty-one thousand, one hundred eighty-nine".