47477665 has 8 divisors (see below), whose sum is σ = 58048488. Its totient is φ = 37265280.

The previous prime is 47477641. The next prime is 47477687. The reversal of 47477665 is 56677474.

47477665 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 19079424 + 28398241 = 4368^2 + 5329^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 47477665 - 2⁷ = 47477537 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 89316 + ... + 89845.

It is an arithmetic number, because the mean of its divisors is an integer number (7256061).

Almost surely, 2^47477665 is an apocalyptic number.

It is an amenable number.

47477665 is a deficient number, since it is larger than the sum of its proper divisors (10570823).

47477665 is a wasteful number, since it uses less digits than its factorization.

47477665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179219.

The product of its digits is 987840, while the sum is 46.

The square root of 47477665 is about 6890.4038343191. The cubic root of 47477665 is about 362.1010497994.

The spelling of 47477665 in words is "forty-seven million, four hundred seventy-seven thousand, six hundred sixty-five".