43724013 has 16 divisors (see below), whose sum is σ = 59068416. Its totient is φ = 28767600.

The previous prime is 43724003. The next prime is 43724039. The reversal of 43724013 is 31042734.

It is not a de Polignac number, because 43724013 - 2¹⁶ = 43658477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43724003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118956 + ... + 119322.

It is an arithmetic number, because the mean of its divisors is an integer number (3691776).

Almost surely, 2^43724013 is an apocalyptic number.

It is an amenable number.

43724013 is a deficient number, since it is larger than the sum of its proper divisors (15344403).

43724013 is a wasteful number, since it uses less digits than its factorization.

43724013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 43724013 is about 6612.4135533102. The cubic root of 43724013 is about 352.2951558700.

Adding to 43724013 its reverse (31042734), we get a palindrome (74766747).

It can be divided in two parts, 4372 and 4013, that added together give a triangular number (8385 = T₁₂₉).

The spelling of 43724013 in words is "forty-three million, seven hundred twenty-four thousand, thirteen".