47171291 has 4 divisors (see below), whose sum is σ = 47322312. Its totient is φ = 47020272.

The previous prime is 47171287. The next prime is 47171297. The reversal of 47171291 is 19217174.

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 47171291 - 2² = 47171287 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47171297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 75041 + ... + 75666.

It is an arithmetic number, because the mean of its divisors is an integer number (11830578).

Almost surely, 2^47171291 is an apocalyptic number.

47171291 is a deficient number, since it is larger than the sum of its proper divisors (151021).

47171291 is a wasteful number, since it uses less digits than its factorization.

47171291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151020.

The product of its digits is 3528, while the sum is 32.

The square root of 47171291 is about 6868.1359188647. The cubic root of 47171291 is about 361.3204874368.

The spelling of 47171291 in words is "forty-seven million, one hundred seventy-one thousand, two hundred ninety-one".