47072147 has 4 divisors (see below), whose sum is σ = 47870040. Its totient is φ = 46274256.

The previous prime is 47072131. The next prime is 47072149. The reversal of 47072147 is 74127074.

47072147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 47072147 - 2⁴ = 47072131 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47072149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398858 + ... + 398975.

It is an arithmetic number, because the mean of its divisors is an integer number (11967510).

Almost surely, 2^47072147 is an apocalyptic number.

47072147 is a deficient number, since it is larger than the sum of its proper divisors (797893).

47072147 is an equidigital number, since it uses as much as digits as its factorization.

47072147 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 797892.

The product of its (nonzero) digits is 10976, while the sum is 32.

The square root of 47072147 is about 6860.9144434252. The cubic root of 47072147 is about 361.0671703291.

The spelling of 47072147 in words is "forty-seven million, seventy-two thousand, one hundred forty-seven".