47809317 has 8 divisors (see below), whose sum is σ = 63841824. Its totient is φ = 31824848.

The previous prime is 47809297. The next prime is 47809319. The reversal of 47809317 is 71390874.

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 47809317 - 2⁸ = 47809061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47809319) 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, 9618 + ... + 13715.

It is an arithmetic number, because the mean of its divisors is an integer number (7980228).

Almost surely, 2^47809317 is an apocalyptic number.

It is an amenable number.

47809317 is a deficient number, since it is larger than the sum of its proper divisors (16032507).

47809317 is a wasteful number, since it uses less digits than its factorization.

47809317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24019.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 47809317 is about 6914.4281759232. The cubic root of 47809317 is about 362.9422382271.

The spelling of 47809317 in words is "forty-seven million, eight hundred nine thousand, three hundred seventeen".