47870087 has 4 divisors (see below), whose sum is σ = 47896056. Its totient is φ = 47844120.

The previous prime is 47870057. The next prime is 47870089. The reversal of 47870087 is 78007874.

It is a happy number.

47870087 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 a de Polignac number, because none of the positive numbers 2^k-47870087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47870089) 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, 9989 + ... + 13982.

It is an arithmetic number, because the mean of its divisors is an integer number (11974014).

Almost surely, 2^47870087 is an apocalyptic number.

47870087 is a deficient number, since it is larger than the sum of its proper divisors (25969).

47870087 is a wasteful number, since it uses less digits than its factorization.

47870087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25968.

The product of its (nonzero) digits is 87808, while the sum is 41.

The square root of 47870087 is about 6918.8212146290. The cubic root of 47870087 is about 363.0959506743.

The spelling of 47870087 in words is "forty-seven million, eight hundred seventy thousand, eighty-seven".