1189473139 has 4 divisors (see below), whose sum is σ = 1189542424. Its totient is φ = 1189403856.

The previous prime is 1189473137. The next prime is 1189473167. The reversal of 1189473139 is 9313749811.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 1189473139 - 2¹ = 1189473137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1189473137) 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, 12439 + ... + 50335.

It is an arithmetic number, because the mean of its divisors is an integer number (297385606).

Almost surely, 2^1189473139 is an apocalyptic number.

1189473139 is a deficient number, since it is larger than the sum of its proper divisors (69285).

1189473139 is an equidigital number, since it uses as much as digits as its factorization.

1189473139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69284.

The product of its digits is 163296, while the sum is 46.

The square root of 1189473139 is about 34488.7393072000. The cubic root of 1189473139 is about 1059.5420886153.

The spelling of 1189473139 in words is "one billion, one hundred eighty-nine million, four hundred seventy-three thousand, one hundred thirty-nine".