47571891 has 4 divisors (see below), whose sum is σ = 63429192. Its totient is φ = 31714592.

The previous prime is 47571871. The next prime is 47571893. The reversal of 47571891 is 19817574.

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 47571891 - 2⁶ = 47571827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47571893) 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, 7928646 + ... + 7928651.

It is an arithmetic number, because the mean of its divisors is an integer number (15857298).

Almost surely, 2^47571891 is an apocalyptic number.

47571891 is a deficient number, since it is larger than the sum of its proper divisors (15857301).

47571891 is a wasteful number, since it uses less digits than its factorization.

47571891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15857300.

The product of its digits is 70560, while the sum is 42.

The square root of 47571891 is about 6897.2379254307. The cubic root of 47571891 is about 362.3404380596.

The spelling of 47571891 in words is "forty-seven million, five hundred seventy-one thousand, eight hundred ninety-one".