47747147 has 4 divisors (see below), whose sum is σ = 54568176. Its totient is φ = 40926120.

The previous prime is 47747129. The next prime is 47747197. The reversal of 47747147 is 74174774.

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

It is a cyclic number.

It is not a de Polignac number, because 47747147 - 2²⁰ = 46698571 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47747197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3410504 + ... + 3410517.

It is an arithmetic number, because the mean of its divisors is an integer number (13642044).

Almost surely, 2^47747147 is an apocalyptic number.

47747147 is a deficient number, since it is larger than the sum of its proper divisors (6821029).

47747147 is an equidigital number, since it uses as much as digits as its factorization.

47747147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6821028.

The product of its digits is 153664, while the sum is 41.

The square root of 47747147 is about 6909.9310416241. The cubic root of 47747147 is about 362.7848497511.

The spelling of 47747147 in words is "forty-seven million, seven hundred forty-seven thousand, one hundred forty-seven".