47453721 has 32 divisors (see below), whose sum is σ = 74929920. Its totient is φ = 26148096.

The previous prime is 47453699. The next prime is 47453729. The reversal of 47453721 is 12735474.

It is not a de Polignac number, because 47453721 - 2¹¹ = 47451673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47453729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 121795 + ... + 122183.

It is an arithmetic number, because the mean of its divisors is an integer number (2341560).

Almost surely, 2^47453721 is an apocalyptic number.

It is an amenable number.

47453721 is a deficient number, since it is larger than the sum of its proper divisors (27476199).

47453721 is a wasteful number, since it uses less digits than its factorization.

47453721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593.

The product of its digits is 23520, while the sum is 33.

The square root of 47453721 is about 6888.6661263266. Note that the first 3 decimals coincide. The cubic root of 47453721 is about 362.0401678004.

The spelling of 47453721 in words is "forty-seven million, four hundred fifty-three thousand, seven hundred twenty-one".