1979433189 has 6 divisors (see below), whose sum is σ = 2859181286. Its totient is φ = 1319622120.

The previous prime is 1979433163. The next prime is 1979433223. The reversal of 1979433189 is 9813349791.

It is a happy number.

1979433189 is a `hidden beast` number, since 197 + 9 + 433 + 18 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1320740964 + 658692225 = 36342^2 + 25665^2 .

It is not a de Polignac number, because 1979433189 - 2¹¹ = 1979431141 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 (1979433139) 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 5 ways as a sum of consecutive naturals, for example, 109968502 + ... + 109968519.

Almost surely, 2^1979433189 is an apocalyptic number.

It is an amenable number.

1979433189 is a deficient number, since it is larger than the sum of its proper divisors (879748097).

1979433189 is a wasteful number, since it uses less digits than its factorization.

1979433189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219937027 (or 219937024 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 1979433189 is about 44490.8214017229. The cubic root of 1979433189 is about 1255.5874011992.

The spelling of 1979433189 in words is "one billion, nine hundred seventy-nine million, four hundred thirty-three thousand, one hundred eighty-nine".