43613 has 2 divisors, whose sum is σ = 43614. Its totient is φ = 43612.

The previous prime is 43609. The next prime is 43627. The reversal of 43613 is 31634.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40804 + 2809 = 202^2 + 53^2 .

43613 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 43613 - 2² = 43609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43591 and 43600.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21806 + 21807.

It is an arithmetic number, because the mean of its divisors is an integer number (21807).

2⁴³⁶¹³ is an apocalyptic number.

It is an amenable number.

43613 is a deficient number, since it is larger than the sum of its proper divisors (1).

43613 is an equidigital number, since it uses as much as digits as its factorization.

43613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 216, while the sum is 17.

The square root of 43613 is about 208.8372572124. The cubic root of 43613 is about 35.1996750142.

It can be divided in two parts, 43 and 613, that added together give a palindrome (656).

The spelling of 43613 in words is "forty-three thousand, six hundred thirteen".