47689809 has 8 divisors (see below), whose sum is σ = 63743520. Its totient is φ = 31714656.

The previous prime is 47689801. The next prime is 47689823. The reversal of 47689809 is 90898674.

It is a happy number.

47689809 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 47689809 - 2³ = 47689801 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47689801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18207 + ... + 20660.

It is an arithmetic number, because the mean of its divisors is an integer number (7967940).

Almost surely, 2^47689809 is an apocalyptic number.

It is an amenable number.

47689809 is a deficient number, since it is larger than the sum of its proper divisors (16053711).

47689809 is a wasteful number, since it uses less digits than its factorization.

47689809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39279.

The product of its (nonzero) digits is 870912, while the sum is 51.

The square root of 47689809 is about 6905.7808392679. The cubic root of 47689809 is about 362.6395727301.

The spelling of 47689809 in words is "forty-seven million, six hundred eighty-nine thousand, eight hundred nine".