842137189 has 4 divisors (see below), whose sum is σ = 842195340. Its totient is φ = 842079040.

The previous prime is 842137181. The next prime is 842137213. The reversal of 842137189 is 981731248.

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 can be written as a sum of positive squares in 2 ways, for example, as 303108100 + 539029089 = 17410^2 + 23217^2 .

It is a cyclic number.

It is not a de Polignac number, because 842137189 - 2³ = 842137181 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 (842137181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11847 + ... + 42715.

It is an arithmetic number, because the mean of its divisors is an integer number (210548835).

Almost surely, 2^842137189 is an apocalyptic number.

It is an amenable number.

842137189 is a deficient number, since it is larger than the sum of its proper divisors (58151).

842137189 is a wasteful number, since it uses less digits than its factorization.

842137189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58150.

The product of its digits is 96768, while the sum is 43.

The square root of 842137189 is about 29019.6000833919. The cubic root of 842137189 is about 944.3383250143.

The spelling of 842137189 in words is "eight hundred forty-two million, one hundred thirty-seven thousand, one hundred eighty-nine".