47815189 has 2 divisors, whose sum is σ = 47815190. Its totient is φ = 47815188.

The previous prime is 47815177. The next prime is 47815199. The reversal of 47815189 is 98151874.

It is a happy number.

47815189 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44422225 + 3392964 = 6665^2 + 1842^2 .

It is a cyclic number.

It is not a de Polignac number, because 47815189 - 2²¹ = 45718037 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47815129) 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 as a sum of consecutive naturals, namely, 23907594 + 23907595.

It is an arithmetic number, because the mean of its divisors is an integer number (23907595).

Almost surely, 2^47815189 is an apocalyptic number.

It is an amenable number.

47815189 is a deficient number, since it is larger than the sum of its proper divisors (1).

47815189 is an equidigital number, since it uses as much as digits as its factorization.

47815189 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 43.

The square root of 47815189 is about 6914.8527822362. The cubic root of 47815189 is about 362.9570966250.

The spelling of 47815189 in words is "forty-seven million, eight hundred fifteen thousand, one hundred eighty-nine".