523431189 has 24 divisors (see below), whose sum is σ = 768339000. Its totient is φ = 343336320.

The previous prime is 523431157. The next prime is 523431191. The reversal of 523431189 is 981134325.

523431189 is a `hidden beast` number, since 523 + 43 + 11 + 89 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 120626289 + 402804900 = 10983^2 + 20070^2 .

It is not a de Polignac number, because 523431189 - 2⁵ = 523431157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523431199) 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 23 ways as a sum of consecutive naturals, for example, 144379 + ... + 147959.

It is an arithmetic number, because the mean of its divisors is an integer number (32014125).

Almost surely, 2^523431189 is an apocalyptic number.

It is an amenable number.

523431189 is a deficient number, since it is larger than the sum of its proper divisors (244907811).

523431189 is a wasteful number, since it uses less digits than its factorization.

523431189 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3845 (or 3842 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 523431189 is about 22878.6185990326. The cubic root of 523431189 is about 805.9099769742.

The spelling of 523431189 in words is "five hundred twenty-three million, four hundred thirty-one thousand, one hundred eighty-nine".