43608013 has 2 divisors, whose sum is σ = 43608014. Its totient is φ = 43608012.

The previous prime is 43608011. The next prime is 43608049. The reversal of 43608013 is 31080634.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43586404 + 21609 = 6602^2 + 147^2 .

It is a cyclic number.

It is not a de Polignac number, because 43608013 - 2¹ = 43608011 is a prime.

Together with 43608011, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43608011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21804006 + 21804007.

It is an arithmetic number, because the mean of its divisors is an integer number (21804007).

Almost surely, 2^43608013 is an apocalyptic number.

It is an amenable number.

43608013 is a deficient number, since it is larger than the sum of its proper divisors (1).

43608013 is an equidigital number, since it uses as much as digits as its factorization.

43608013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 43608013 is about 6603.6363467411. The cubic root of 43608013 is about 351.9833330822.

Adding to 43608013 its reverse (31080634), we get a palindrome (74688647).

The spelling of 43608013 in words is "forty-three million, six hundred eight thousand, thirteen".