47827987 has 4 divisors (see below), whose sum is σ = 50641416. Its totient is φ = 45014560.

The previous prime is 47827981. The next prime is 47828029. The reversal of 47827987 is 78972874.

It is a happy number.

47827987 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 47827987 - 2³ = 47827979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47827981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1406689 + ... + 1406722.

It is an arithmetic number, because the mean of its divisors is an integer number (12660354).

Almost surely, 2^47827987 is an apocalyptic number.

47827987 is a deficient number, since it is larger than the sum of its proper divisors (2813429).

47827987 is a wasteful number, since it uses less digits than its factorization.

47827987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2813428.

The product of its digits is 1580544, while the sum is 52.

The square root of 47827987 is about 6915.7781196334. The cubic root of 47827987 is about 362.9894762283.

It can be divided in two parts, 4782 and 7987, that added together give a square (12769 = 113²).

The spelling of 47827987 in words is "forty-seven million, eight hundred twenty-seven thousand, nine hundred eighty-seven".