43243409 has 8 divisors (see below), whose sum is σ = 47705760. Its totient is φ = 38869600.

The previous prime is 43243399. The next prime is 43243429. The reversal of 43243409 is 90434234.

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

It is a de Polignac number, because none of the positive numbers 2^k-43243409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43243429) 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, 21107 + ... + 23064.

It is an arithmetic number, because the mean of its divisors is an integer number (5963220).

Almost surely, 2^43243409 is an apocalyptic number.

It is an amenable number.

43243409 is a deficient number, since it is larger than the sum of its proper divisors (4462351).

43243409 is a wasteful number, since it uses less digits than its factorization.

43243409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44271.

The product of its (nonzero) digits is 10368, while the sum is 29.

The square root of 43243409 is about 6575.9720954396. The cubic root of 43243409 is about 350.9996158036. Note that the first 3 decimals are identical.

The spelling of 43243409 in words is "forty-three million, two hundred forty-three thousand, four hundred nine".