47289817 has 4 divisors (see below), whose sum is σ = 49345920. Its totient is φ = 45233716.

The previous prime is 47289793. The next prime is 47289829. The reversal of 47289817 is 71898274.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47289817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47289217) 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, 1028017 + ... + 1028062.

It is an arithmetic number, because the mean of its divisors is an integer number (12336480).

Almost surely, 2^47289817 is an apocalyptic number.

It is an amenable number.

47289817 is a deficient number, since it is larger than the sum of its proper divisors (2056103).

47289817 is a wasteful number, since it uses less digits than its factorization.

47289817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2056102.

The product of its digits is 225792, while the sum is 46.

The square root of 47289817 is about 6876.7591931083. The cubic root of 47289817 is about 361.6228609925.

The spelling of 47289817 in words is "forty-seven million, two hundred eighty-nine thousand, eight hundred seventeen".