613723 has 4 divisors (see below), whose sum is σ = 669528. Its totient is φ = 557920.

The previous prime is 613699. The next prime is 613733. The reversal of 613723 is 327316.

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

It is not a de Polignac number, because 613723 - 2¹³ = 605531 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 613694 and 613703.

It is not an unprimeable number, because it can be changed into a prime (613733) 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, 27886 + ... + 27907.

It is an arithmetic number, because the mean of its divisors is an integer number (167382).

2⁶¹³⁷²³ is an apocalyptic number.

613723 is a deficient number, since it is larger than the sum of its proper divisors (55805).

613723 is a wasteful number, since it uses less digits than its factorization.

613723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55804.

The product of its digits is 756, while the sum is 22.

The square root of 613723 is about 783.4047485176. The cubic root of 613723 is about 84.9814492389.

The spelling of 613723 in words is "six hundred thirteen thousand, seven hundred twenty-three".