47881187 has 4 divisors (see below), whose sum is σ = 47895696. Its totient is φ = 47866680.

The previous prime is 47881133. The next prime is 47881201. The reversal of 47881187 is 78118874.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 47881187 - 2¹⁰ = 47880163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47881487) 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, 362 + ... + 9792.

It is an arithmetic number, because the mean of its divisors is an integer number (11973924).

Almost surely, 2^47881187 is an apocalyptic number.

47881187 is a deficient number, since it is larger than the sum of its proper divisors (14509).

47881187 is an equidigital number, since it uses as much as digits as its factorization.

47881187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14508.

The product of its digits is 100352, while the sum is 44.

The square root of 47881187 is about 6919.6233278987. The cubic root of 47881187 is about 363.1240131090.

The spelling of 47881187 in words is "forty-seven million, eight hundred eighty-one thousand, one hundred eighty-seven".