47720165 has 16 divisors (see below), whose sum is σ = 58423680. Its totient is φ = 37410240.

The previous prime is 47720161. The next prime is 47720171. The reversal of 47720165 is 56102774.

47720165 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 47720165 - 2² = 47720161 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47720161) 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 15 ways as a sum of consecutive naturals, for example, 81002 + ... + 81588.

It is an arithmetic number, because the mean of its divisors is an integer number (3651480).

Almost surely, 2^47720165 is an apocalyptic number.

It is an amenable number.

47720165 is a deficient number, since it is larger than the sum of its proper divisors (10703515).

47720165 is a wasteful number, since it uses less digits than its factorization.

47720165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 892.

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 47720165 is about 6907.9783583911. The cubic root of 47720165 is about 362.7165000808.

The spelling of 47720165 in words is "forty-seven million, seven hundred twenty thousand, one hundred sixty-five".