3123189 has 24 divisors (see below), whose sum is σ = 4843800. Its totient is φ = 1932288.

The previous prime is 3123187. The next prime is 3123203. The reversal of 3123189 is 9813213.

It can be written as a sum of positive squares in 4 ways, for example, as 400689 + 2722500 = 633^2 + 1650^2 .

It is not a de Polignac number, because 3123189 - 2¹ = 3123187 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3123181) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20887 + ... + 21035.

It is an arithmetic number, because the mean of its divisors is an integer number (201825).

Almost surely, 2^3123189 is an apocalyptic number.

It is an amenable number.

3123189 is a deficient number, since it is larger than the sum of its proper divisors (1720611).

3123189 is a wasteful number, since it uses less digits than its factorization.

3123189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309 (or 306 counting only the distinct ones).

The product of its digits is 1296, while the sum is 27.

The square root of 3123189 is about 1767.2546505810. The cubic root of 3123189 is about 146.1726393406.

It can be divided in two parts, 31 and 23189, that added together give a triangular number (23220 = T₂₁₅).

The spelling of 3123189 in words is "three million, one hundred twenty-three thousand, one hundred eighty-nine".