47735721 has 12 divisors (see below), whose sum is σ = 75220080. Its totient is φ = 28930680.

The previous prime is 47735651. The next prime is 47735747. The reversal of 47735721 is 12753774.

47735721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 47735721 - 2¹⁴ = 47719337 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47735621) 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 11 ways as a sum of consecutive naturals, for example, 240991 + ... + 241188.

It is an arithmetic number, because the mean of its divisors is an integer number (6268340).

Almost surely, 2^47735721 is an apocalyptic number.

It is an amenable number.

47735721 is a deficient number, since it is larger than the sum of its proper divisors (27484359).

47735721 is a wasteful number, since it uses less digits than its factorization.

47735721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 482196 (or 482193 counting only the distinct ones).

The product of its digits is 41160, while the sum is 36.

The square root of 47735721 is about 6909.1042111116. The cubic root of 47735721 is about 362.7559090314.

The spelling of 47735721 in words is "forty-seven million, seven hundred thirty-five thousand, seven hundred twenty-one".