618139189 has 4 divisors (see below), whose sum is σ = 618191680. Its totient is φ = 618086700.

The previous prime is 618139183. The next prime is 618139219. The reversal of 618139189 is 981931816.

It is a happy number.

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, 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 618139189 - 2¹⁹ = 617614901 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 (618139183) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 514 + ... + 35164.

It is an arithmetic number, because the mean of its divisors is an integer number (154547920).

Almost surely, 2^618139189 is an apocalyptic number.

It is an amenable number.

618139189 is a deficient number, since it is larger than the sum of its proper divisors (52491).

618139189 is a wasteful number, since it uses less digits than its factorization.

618139189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52490.

The product of its digits is 93312, while the sum is 46.

The square root of 618139189 is about 24862.4051330518. The cubic root of 618139189 is about 851.8479697619.

The spelling of 618139189 in words is "six hundred eighteen million, one hundred thirty-nine thousand, one hundred eighty-nine".