47708421 has 4 divisors (see below), whose sum is σ = 63611232. Its totient is φ = 31805612.

The previous prime is 47708413. The next prime is 47708447. The reversal of 47708421 is 12480774.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 47708421 - 2³ = 47708413 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47708471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7951401 + ... + 7951406.

It is an arithmetic number, because the mean of its divisors is an integer number (15902808).

Almost surely, 2^47708421 is an apocalyptic number.

It is an amenable number.

47708421 is a deficient number, since it is larger than the sum of its proper divisors (15902811).

47708421 is a wasteful number, since it uses less digits than its factorization.

47708421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15902810.

The product of its (nonzero) digits is 12544, while the sum is 33.

The square root of 47708421 is about 6907.1282744712. The cubic root of 47708421 is about 362.6867426253.

The spelling of 47708421 in words is "forty-seven million, seven hundred eight thousand, four hundred twenty-one".