47209817 has 8 divisors (see below), whose sum is σ = 49171392. Its totient is φ = 45284400.

The previous prime is 47209763. The next prime is 47209831. The reversal of 47209817 is 71890274.

47209817 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 a cyclic number.

It is not a de Polignac number, because 47209817 - 2²² = 43015513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47209517) 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, 6359 + ... + 11612.

It is an arithmetic number, because the mean of its divisors is an integer number (6146424).

Almost surely, 2^47209817 is an apocalyptic number.

It is an amenable number.

47209817 is a deficient number, since it is larger than the sum of its proper divisors (1961575).

47209817 is a wasteful number, since it uses less digits than its factorization.

47209817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18079.

The product of its (nonzero) digits is 28224, while the sum is 38.

The square root of 47209817 is about 6870.9400375786. The cubic root of 47209817 is about 361.4188272310.

The spelling of 47209817 in words is "forty-seven million, two hundred nine thousand, eight hundred seventeen".