43042809 has 8 divisors (see below), whose sum is σ = 60411040. Its totient is φ = 27184896.

The previous prime is 43042807. The next prime is 43042817. The reversal of 43042809 is 90824034.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 43042809 - 2¹ = 43042807 is a prime.

It is a super-2 number, since 2×43042809² = 3705366813220962, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43042807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 377512 + ... + 377625.

It is an arithmetic number, because the mean of its divisors is an integer number (7551380).

Almost surely, 2^43042809 is an apocalyptic number.

It is an amenable number.

43042809 is a deficient number, since it is larger than the sum of its proper divisors (17368231).

43042809 is a wasteful number, since it uses less digits than its factorization.

43042809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 755159.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 43042809 is about 6560.7018679407. The cubic root of 43042809 is about 350.4560286936.

The spelling of 43042809 in words is "forty-three million, forty-two thousand, eight hundred nine".