47105287 has 4 divisors (see below), whose sum is σ = 47994120. Its totient is φ = 46216456.

The previous prime is 47105263. The next prime is 47105291. The reversal of 47105287 is 78250174.

It is a happy number.

47105287 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 47105287 - 2²³ = 38716679 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 (47105257) 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, 444337 + ... + 444442.

It is an arithmetic number, because the mean of its divisors is an integer number (11998530).

Almost surely, 2^47105287 is an apocalyptic number.

47105287 is a deficient number, since it is larger than the sum of its proper divisors (888833).

47105287 is an equidigital number, since it uses as much as digits as its factorization.

47105287 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 888832.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 47105287 is about 6863.3291484527. The cubic root of 47105287 is about 361.1518839712.

The spelling of 47105287 in words is "forty-seven million, one hundred five thousand, two hundred eighty-seven".