523889 has 4 divisors (see below), whose sum is σ = 554724. Its totient is φ = 493056.

The previous prime is 523877. The next prime is 523903. The reversal of 523889 is 988325.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 187489 + 336400 = 433^2 + 580^2 .

It is a cyclic number.

It is not a de Polignac number, because 523889 - 2¹² = 519793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (523829) 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, 15392 + ... + 15425.

It is an arithmetic number, because the mean of its divisors is an integer number (138681).

2⁵²³⁸⁸⁹ is an apocalyptic number.

It is an amenable number.

523889 is a deficient number, since it is larger than the sum of its proper divisors (30835).

523889 is a wasteful number, since it uses less digits than its factorization.

523889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30834.

The product of its digits is 17280, while the sum is 35.

The square root of 523889 is about 723.8017684422. The cubic root of 523889 is about 80.6144867409.

The spelling of 523889 in words is "five hundred twenty-three thousand, eight hundred eighty-nine".