47876421 has 8 divisors (see below), whose sum is σ = 63979200. Its totient is φ = 31845632.

The previous prime is 47876407. The next prime is 47876429. The reversal of 47876421 is 12467874.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 47876421 - 2⁷ = 47876293 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 47876421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47876429) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16425 + ... + 19118.

It is an arithmetic number, because the mean of its divisors is an integer number (7997400).

Almost surely, 2^47876421 is an apocalyptic number.

It is an amenable number.

47876421 is a deficient number, since it is larger than the sum of its proper divisors (16102779).

47876421 is a wasteful number, since it uses less digits than its factorization.

47876421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35995.

The product of its digits is 75264, while the sum is 39.

The square root of 47876421 is about 6919.2789364210. The cubic root of 47876421 is about 363.1119644905. Note that the first 3 decimals are identical.

The spelling of 47876421 in words is "forty-seven million, eight hundred seventy-six thousand, four hundred twenty-one".