47642147 has 4 divisors (see below), whose sum is σ = 54448176. Its totient is φ = 40836120.

The previous prime is 47642141. The next prime is 47642149. The reversal of 47642147 is 74124674.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47642147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47642141) 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, 3403004 + ... + 3403017.

It is an arithmetic number, because the mean of its divisors is an integer number (13612044).

Almost surely, 2^47642147 is an apocalyptic number.

47642147 is a deficient number, since it is larger than the sum of its proper divisors (6806029).

47642147 is an equidigital number, since it uses as much as digits as its factorization.

47642147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6806028.

The product of its digits is 37632, while the sum is 35.

The square root of 47642147 is about 6902.3290996590. The cubic root of 47642147 is about 362.5187230916.

The spelling of 47642147 in words is "forty-seven million, six hundred forty-two thousand, one hundred forty-seven".