47790181 has 4 divisors (see below), whose sum is σ = 48395200. Its totient is φ = 47185164.

The previous prime is 47790163. The next prime is 47790191. The reversal of 47790181 is 18109774.

47790181 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 not a de Polignac number, because 47790181 - 2¹¹ = 47788133 is a prime.

It is a super-2 number, since 2×47790181² = 4567802800025522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47790181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47790101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 302391 + ... + 302548.

It is an arithmetic number, because the mean of its divisors is an integer number (12098800).

Almost surely, 2^47790181 is an apocalyptic number.

It is an amenable number.

47790181 is a deficient number, since it is larger than the sum of its proper divisors (605019).

47790181 is an equidigital number, since it uses as much as digits as its factorization.

47790181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 605018.

The product of its (nonzero) digits is 14112, while the sum is 37.

The square root of 47790181 is about 6913.0442642876. The cubic root of 47790181 is about 362.8938084095.

The spelling of 47790181 in words is "forty-seven million, seven hundred ninety thousand, one hundred eighty-one".