43738009 has 16 divisors (see below), whose sum is σ = 51420160. Its totient is φ = 36424080.

The previous prime is 43738007. The next prime is 43738027. The reversal of 43738009 is 90083734.

It is not a de Polignac number, because 43738009 - 2¹ = 43738007 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43738001) 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, 99412 + ... + 99850.

It is an arithmetic number, because the mean of its divisors is an integer number (3213760).

Almost surely, 2^43738009 is an apocalyptic number.

It is an amenable number.

43738009 is a deficient number, since it is larger than the sum of its proper divisors (7682151).

43738009 is a wasteful number, since it uses less digits than its factorization.

43738009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 820.

The product of its (nonzero) digits is 18144, while the sum is 34.

The square root of 43738009 is about 6613.4717811449. The cubic root of 43738009 is about 352.3327416011.

The spelling of 43738009 in words is "forty-three million, seven hundred thirty-eight thousand, nine".