47213917 has 8 divisors (see below), whose sum is σ = 51860160. Its totient is φ = 42783840.

The previous prime is 47213911. The next prime is 47213921. The reversal of 47213917 is 71931274.

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 47213917 - 2³ = 47213909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47213911) 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, 53584 + ... + 54457.

It is an arithmetic number, because the mean of its divisors is an integer number (6482520).

Almost surely, 2^47213917 is an apocalyptic number.

It is an amenable number.

47213917 is a deficient number, since it is larger than the sum of its proper divisors (4646243).

47213917 is a wasteful number, since it uses less digits than its factorization.

47213917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108083.

The product of its digits is 10584, while the sum is 34.

The square root of 47213917 is about 6871.2383891115. The cubic root of 47213917 is about 361.4292895628.

The spelling of 47213917 in words is "forty-seven million, two hundred thirteen thousand, nine hundred seventeen".