43457009 has 16 divisors (see below), whose sum is σ = 47808000. Its totient is φ = 39346560.

The previous prime is 43457003. The next prime is 43457021. The reversal of 43457009 is 90075434.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43457009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43457003) 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, 52007 + ... + 52835.

It is an arithmetic number, because the mean of its divisors is an integer number (2988000).

Almost surely, 2^43457009 is an apocalyptic number.

It is an amenable number.

43457009 is a deficient number, since it is larger than the sum of its proper divisors (4350991).

43457009 is a wasteful number, since it uses less digits than its factorization.

43457009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968.

The product of its (nonzero) digits is 15120, while the sum is 32.

The square root of 43457009 is about 6592.1930341882. The cubic root of 43457009 is about 351.5765855189.

The spelling of 43457009 in words is "forty-three million, four hundred fifty-seven thousand, nine".