47681421 has 16 divisors (see below), whose sum is σ = 64992768. Its totient is φ = 31086000.

The previous prime is 47681363. The next prime is 47681437. The reversal of 47681421 is 12418674.

It is not a de Polignac number, because 47681421 - 2⁶ = 47681357 is a prime.

Its product of digits (10752) is a multiple of the sum of its prime divisors (1792).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47681471) 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, 29566 + ... + 31136.

It is an arithmetic number, because the mean of its divisors is an integer number (4062048).

Almost surely, 2^47681421 is an apocalyptic number.

It is an amenable number.

47681421 is a deficient number, since it is larger than the sum of its proper divisors (17311347).

47681421 is a wasteful number, since it uses less digits than its factorization.

47681421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1792.

The product of its digits is 10752, while the sum is 33.

The square root of 47681421 is about 6905.1734952860. The cubic root of 47681421 is about 362.6183103321.

The spelling of 47681421 in words is "forty-seven million, six hundred eighty-one thousand, four hundred twenty-one".