47720417 has 8 divisors (see below), whose sum is σ = 49310016. Its totient is φ = 46146672.

The previous prime is 47720401. The next prime is 47720429. The reversal of 47720417 is 71402774.

47720417 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 47720417 - 2⁴ = 47720401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47720447) 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 7 ways as a sum of consecutive naturals, for example, 2318 + ... + 10040.

It is an arithmetic number, because the mean of its divisors is an integer number (6163752).

Almost surely, 2^47720417 is an apocalyptic number.

It is an amenable number.

47720417 is a deficient number, since it is larger than the sum of its proper divisors (1589599).

47720417 is a wasteful number, since it uses less digits than its factorization.

47720417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7927.

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

The square root of 47720417 is about 6907.9965981462. The cubic root of 47720417 is about 362.7171385558.

The spelling of 47720417 in words is "forty-seven million, seven hundred twenty thousand, four hundred seventeen".