47736821 has 8 divisors (see below), whose sum is σ = 52351488. Its totient is φ = 43168000.

The previous prime is 47736811. The next prime is 47736823. The reversal of 47736821 is 12863774.

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 47736821 - 2²² = 43542517 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 (47736823) 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, 9260 + ... + 13461.

It is an arithmetic number, because the mean of its divisors is an integer number (6543936).

Almost surely, 2^47736821 is an apocalyptic number.

It is an amenable number.

47736821 is a deficient number, since it is larger than the sum of its proper divisors (4614667).

47736821 is a wasteful number, since it uses less digits than its factorization.

47736821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22923.

The product of its digits is 56448, while the sum is 38.

The square root of 47736821 is about 6909.1838157629. The cubic root of 47736821 is about 362.7586954035.

The spelling of 47736821 in words is "forty-seven million, seven hundred thirty-six thousand, eight hundred twenty-one".