47572645 has 4 divisors (see below), whose sum is σ = 57087180. Its totient is φ = 38058112.

The previous prime is 47572643. The next prime is 47572687. The reversal of 47572645 is 54627574.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20511841 + 27060804 = 4529^2 + 5202^2 .

It is a cyclic number.

It is not a de Polignac number, because 47572645 - 2¹ = 47572643 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 47572598 and 47572607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47572643) 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, 4757260 + ... + 4757269.

It is an arithmetic number, because the mean of its divisors is an integer number (14271795).

Almost surely, 2^47572645 is an apocalyptic number.

It is an amenable number.

47572645 is a deficient number, since it is larger than the sum of its proper divisors (9514535).

47572645 is an equidigital number, since it uses as much as digits as its factorization.

47572645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9514534.

The product of its digits is 235200, while the sum is 40.

The square root of 47572645 is about 6897.2925847756. The cubic root of 47572645 is about 362.3423523780.

The spelling of 47572645 in words is "forty-seven million, five hundred seventy-two thousand, six hundred forty-five".