47891812 has 6 divisors (see below), whose sum is σ = 83810678. Its totient is φ = 23945904.

The previous prime is 47891803. The next prime is 47891821. The reversal of 47891812 is 21819874.

It is a happy number.

47891812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (47891803) and next prime (47891821).

It can be written as a sum of positive squares in only one way, i.e., 25462116 + 22429696 = 5046^2 + 4736^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5986473 + ... + 5986480.

Almost surely, 2^47891812 is an apocalyptic number.

It is an amenable number.

47891812 is a deficient number, since it is larger than the sum of its proper divisors (35918866).

47891812 is a wasteful number, since it uses less digits than its factorization.

47891812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11972957 (or 11972955 counting only the distinct ones).

The product of its digits is 32256, while the sum is 40.

The square root of 47891812 is about 6920.3910294145. The cubic root of 47891812 is about 363.1508706115.

The spelling of 47891812 in words is "forty-seven million, eight hundred ninety-one thousand, eight hundred twelve".