47861871 has 4 divisors (see below), whose sum is σ = 63815832. Its totient is φ = 31907912.

The previous prime is 47861857. The next prime is 47861899. The reversal of 47861871 is 17816874.

It is a happy number.

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 47861871 - 2⁷ = 47861743 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47861371) 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, 7976976 + ... + 7976981.

It is an arithmetic number, because the mean of its divisors is an integer number (15953958).

Almost surely, 2^47861871 is an apocalyptic number.

47861871 is a deficient number, since it is larger than the sum of its proper divisors (15953961).

47861871 is a wasteful number, since it uses less digits than its factorization.

47861871 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15953960.

The product of its digits is 75264, while the sum is 42.

The square root of 47861871 is about 6918.2274463912. The cubic root of 47861871 is about 363.0751766224.

The spelling of 47861871 in words is "forty-seven million, eight hundred sixty-one thousand, eight hundred seventy-one".