47645 has 8 divisors (see below), whose sum is σ = 61656. Its totient is φ = 35136.

The previous prime is 47639. The next prime is 47653. The reversal of 47645 is 54674.

It can be written as a sum of positive squares in 4 ways, for example, as 8836 + 38809 = 94^2 + 197^2 .

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 47645 - 2⁴ = 47629 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 302 + ... + 431.

It is an arithmetic number, because the mean of its divisors is an integer number (7707).

2⁴⁷⁶⁴⁵ is an apocalyptic number.

It is an amenable number.

47645 is a deficient number, since it is larger than the sum of its proper divisors (14011).

47645 is a wasteful number, since it uses less digits than its factorization.

47645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751.

The product of its digits is 3360, while the sum is 26.

The square root of 47645 is about 218.2773465113. The cubic root of 47645 is about 36.2525959298.

The spelling of 47645 in words is "forty-seven thousand, six hundred forty-five".