47784121 has 16 divisors (see below), whose sum is σ = 60398208. Its totient is φ = 36720000.

The previous prime is 47784119. The next prime is 47784173. The reversal of 47784121 is 12148774.

It is a cyclic number.

It is not a de Polignac number, because 47784121 - 2¹ = 47784119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47784421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1371 + ... + 9871.

It is an arithmetic number, because the mean of its divisors is an integer number (3774888).

Almost surely, 2^47784121 is an apocalyptic number.

It is an amenable number.

47784121 is a deficient number, since it is larger than the sum of its proper divisors (12614087).

47784121 is a wasteful number, since it uses less digits than its factorization.

47784121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8592.

The product of its digits is 12544, while the sum is 34.

The square root of 47784121 is about 6912.6059485551. The cubic root of 47784121 is about 362.8784689304.

The spelling of 47784121 in words is "forty-seven million, seven hundred eighty-four thousand, one hundred twenty-one".