47705817 has 4 divisors (see below), whose sum is σ = 63607760. Its totient is φ = 31803876.

The previous prime is 47705803. The next prime is 47705821. The reversal of 47705817 is 71850774.

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 not a de Polignac number, because 47705817 - 2⁶ = 47705753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47704817) 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, 7950967 + ... + 7950972.

It is an arithmetic number, because the mean of its divisors is an integer number (15901940).

Almost surely, 2^47705817 is an apocalyptic number.

It is an amenable number.

47705817 is a deficient number, since it is larger than the sum of its proper divisors (15901943).

47705817 is a wasteful number, since it uses less digits than its factorization.

47705817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15901942.

The product of its (nonzero) digits is 54880, while the sum is 39.

The square root of 47705817 is about 6906.9397709840. The cubic root of 47705817 is about 362.6801438359.

The spelling of 47705817 in words is "forty-seven million, seven hundred five thousand, eight hundred seventeen".