47916121 has 6 divisors (see below), whose sum is σ = 52668266. Its totient is φ = 43560000.

The previous prime is 47916109. The next prime is 47916131. The reversal of 47916121 is 12161974.

47916121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 26163225 + 21752896 = 5115^2 + 4664^2 .

It is not a de Polignac number, because 47916121 - 2¹¹ = 47914073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47916101) 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 5 ways as a sum of consecutive naturals, for example, 197880 + ... + 198121.

Almost surely, 2^47916121 is an apocalyptic number.

It is an amenable number.

47916121 is a deficient number, since it is larger than the sum of its proper divisors (4752145).

47916121 is a wasteful number, since it uses less digits than its factorization.

47916121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396023 (or 396012 counting only the distinct ones).

The product of its digits is 3024, while the sum is 31.

The square root of 47916121 is about 6922.1471379912. The cubic root of 47916121 is about 363.2123031122.

The spelling of 47916121 in words is "forty-seven million, nine hundred sixteen thousand, one hundred twenty-one".