47989191 has 8 divisors (see below), whose sum is σ = 64030720. Its totient is φ = 31970232.

The previous prime is 47989187. The next prime is 47989199. The reversal of 47989191 is 19198974.

47989191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 47989191 - 2² = 47989187 is a prime.

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 47989191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47989199) 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 7 ways as a sum of consecutive naturals, for example, 180 + ... + 9798.

It is an arithmetic number, because the mean of its divisors is an integer number (8003840).

Almost surely, 2^47989191 is an apocalyptic number.

47989191 is a deficient number, since it is larger than the sum of its proper divisors (16041529).

47989191 is a wasteful number, since it uses less digits than its factorization.

47989191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11285.

The product of its digits is 163296, while the sum is 48.

The square root of 47989191 is about 6927.4231139725. The cubic root of 47989191 is about 363.3968369956.

The spelling of 47989191 in words is "forty-seven million, nine hundred eighty-nine thousand, one hundred ninety-one".