42704809 has 8 divisors (see below), whose sum is σ = 48934080. Its totient is φ = 36507696.

The previous prime is 42704801. The next prime is 42704843. The reversal of 42704809 is 90840724.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 42704809 - 2³ = 42704801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42704801) 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, 5119 + ... + 10564.

It is an arithmetic number, because the mean of its divisors is an integer number (6116760).

Almost surely, 2^42704809 is an apocalyptic number.

It is an amenable number.

42704809 is a deficient number, since it is larger than the sum of its proper divisors (6229271).

42704809 is a wasteful number, since it uses less digits than its factorization.

42704809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16079.

The product of its (nonzero) digits is 16128, while the sum is 34.

The square root of 42704809 is about 6534.8916593927. The cubic root of 42704809 is about 349.5362811232.

The spelling of 42704809 in words is "forty-two million, seven hundred four thousand, eight hundred nine".