47862821 has 4 divisors (see below), whose sum is σ = 47880000. Its totient is φ = 47845644.

The previous prime is 47862817. The next prime is 47862833. The reversal of 47862821 is 12826874.

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 47862821 - 2² = 47862817 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47862851) 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, 3341 + ... + 10338.

It is an arithmetic number, because the mean of its divisors is an integer number (11970000).

Almost surely, 2^47862821 is an apocalyptic number.

It is an amenable number.

47862821 is a deficient number, since it is larger than the sum of its proper divisors (17179).

47862821 is a wasteful number, since it uses less digits than its factorization.

47862821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17178.

The product of its digits is 43008, while the sum is 38.

The square root of 47862821 is about 6918.2961052560. The cubic root of 47862821 is about 363.0775788069.

The spelling of 47862821 in words is "forty-seven million, eight hundred sixty-two thousand, eight hundred twenty-one".