613823 has 6 divisors (see below), whose sum is σ = 714096. Its totient is φ = 526092.

The previous prime is 613817. The next prime is 613829. The reversal of 613823 is 328316.

It is an interprime number because it is at equal distance from previous prime (613817) and next prime (613829).

It is not a de Polignac number, because 613823 - 2⁴ = 613807 is a prime.

It is a Duffinian number.

It is a plaindrome in base 8.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (613829) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6215 + ... + 6312.

It is an arithmetic number, because the mean of its divisors is an integer number (119016).

2⁶¹³⁸²³ is an apocalyptic number.

613823 is a deficient number, since it is larger than the sum of its proper divisors (100273).

613823 is a wasteful number, since it uses less digits than its factorization.

613823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12541 (or 12534 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 613823 is about 783.4685698865. The cubic root of 613823 is about 84.9860646128.

The spelling of 613823 in words is "six hundred thirteen thousand, eight hundred twenty-three".