838745189 has 4 divisors (see below), whose sum is σ = 838803756. Its totient is φ = 838686624.

The previous prime is 838745137. The next prime is 838745191. The reversal of 838745189 is 981547838.

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 400680289 + 438064900 = 20017^2 + 20930^2 .

It is a cyclic number.

It is not a de Polignac number, because 838745189 - 2²⁴ = 821967973 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 838745189.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (838745389) 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, 8147 + ... + 41759.

It is an arithmetic number, because the mean of its divisors is an integer number (209700939).

Almost surely, 2^838745189 is an apocalyptic number.

It is an amenable number.

838745189 is a deficient number, since it is larger than the sum of its proper divisors (58567).

838745189 is a wasteful number, since it uses less digits than its factorization.

838745189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58566.

The product of its digits is 1935360, while the sum is 53.

The square root of 838745189 is about 28961.0978555717. The cubic root of 838745189 is about 943.0687353913.

The spelling of 838745189 in words is "eight hundred thirty-eight million, seven hundred forty-five thousand, one hundred eighty-nine".