47191 has 4 divisors (see below), whose sum is σ = 48384. Its totient is φ = 46000.

The previous prime is 47189. The next prime is 47207. The reversal of 47191 is 19174.

47191 = T₂₆ + T₂₇ + ... + T₆₆.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19174 = 2 ⋅9587.

It is a cyclic number.

It is not a de Polignac number, because 47191 - 2¹ = 47189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47111) 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, 535 + ... + 616.

It is an arithmetic number, because the mean of its divisors is an integer number (12096).

2⁴⁷¹⁹¹ is an apocalyptic number.

47191 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

47191 is a deficient number, since it is larger than the sum of its proper divisors (1193).

47191 is a wasteful number, since it uses less digits than its factorization.

47191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192.

The product of its digits is 252, while the sum is 22.

The square root of 47191 is about 217.2348959076. The cubic root of 47191 is about 36.1370802461.

The spelling of 47191 in words is "forty-seven thousand, one hundred ninety-one".