47890171 has 4 divisors (see below), whose sum is σ = 54731632. Its totient is φ = 41048712.

The previous prime is 47890169. The next prime is 47890187. The reversal of 47890171 is 17109874.

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

It is a cyclic number.

It is not a de Polignac number, because 47890171 - 2¹ = 47890169 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 47890171.

It is not an unprimeable number, because it can be changed into a prime (47890471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3420720 + ... + 3420733.

It is an arithmetic number, because the mean of its divisors is an integer number (13682908).

Almost surely, 2^47890171 is an apocalyptic number.

47890171 is a deficient number, since it is larger than the sum of its proper divisors (6841461).

47890171 is an equidigital number, since it uses as much as digits as its factorization.

47890171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6841460.

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

The square root of 47890171 is about 6920.2724657343. The cubic root of 47890171 is about 363.1467228086.

The spelling of 47890171 in words is "forty-seven million, eight hundred ninety thousand, one hundred seventy-one".