523399 has 4 divisors (see below), whose sum is σ = 525160. Its totient is φ = 521640.

The previous prime is 523387. The next prime is 523403. The reversal of 523399 is 993325.

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

It is a cyclic number.

It is not a de Polignac number, because 523399 - 2⁹ = 522887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 523399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (523349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312 + ... + 1069.

It is an arithmetic number, because the mean of its divisors is an integer number (131290).

2⁵²³³⁹⁹ is an apocalyptic number.

523399 is a deficient number, since it is larger than the sum of its proper divisors (1761).

523399 is a wasteful number, since it uses less digits than its factorization.

523399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1760.

The product of its digits is 7290, while the sum is 31.

The square root of 523399 is about 723.4631987876. The cubic root of 523399 is about 80.5893456517.

The spelling of 523399 in words is "five hundred twenty-three thousand, three hundred ninety-nine".