523723 has 4 divisors (see below), whose sum is σ = 526240. Its totient is φ = 521208.

The previous prime is 523717. The next prime is 523729. The reversal of 523723 is 327325.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (523717) and next prime (523729).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-523723 is a prime.

It is a Duffinian number.

523723 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 523694 and 523703.

It is not an unprimeable number, because it can be changed into a prime (523729) 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, 915 + ... + 1372.

It is an arithmetic number, because the mean of its divisors is an integer number (131560).

2⁵²³⁷²³ is an apocalyptic number.

523723 is the 458-th heptagonal number.

523723 is a deficient number, since it is larger than the sum of its proper divisors (2517).

523723 is a wasteful number, since it uses less digits than its factorization.

523723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2516.

The product of its digits is 1260, while the sum is 22.

The square root of 523723 is about 723.6870870756. The cubic root of 523723 is about 80.6059713120.

The spelling of 523723 in words is "five hundred twenty-three thousand, seven hundred twenty-three".