47213717 has 4 divisors (see below), whose sum is σ = 47248320. Its totient is φ = 47179116.

The previous prime is 47213707. The next prime is 47213731. The reversal of 47213717 is 71731274.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 71731274 = 2 ⋅35865637.

It is a cyclic number.

It is not a de Polignac number, because 47213717 - 2¹⁴ = 47197333 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 (47213707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15167 + ... + 18012.

It is an arithmetic number, because the mean of its divisors is an integer number (11812080).

Almost surely, 2^47213717 is an apocalyptic number.

It is an amenable number.

47213717 is a deficient number, since it is larger than the sum of its proper divisors (34603).

47213717 is a wasteful number, since it uses less digits than its factorization.

47213717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34602.

The product of its digits is 8232, while the sum is 32.

The square root of 47213717 is about 6871.2238356788. The cubic root of 47213717 is about 361.4287792192.

The spelling of 47213717 in words is "forty-seven million, two hundred thirteen thousand, seven hundred seventeen".