47665985 has 16 divisors (see below), whose sum is σ = 59007312. Its totient is φ = 36940800.

The previous prime is 47665979. The next prime is 47665991. The reversal of 47665985 is 58956674.

47665985 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (47665979) and next prime (47665991).

It can be written as a sum of positive squares in 8 ways, for example, as 10784656 + 36881329 = 3284^2 + 6073^2 .

It is not a de Polignac number, because 47665985 - 2²⁰ = 46617409 is a prime.

It is a super-2 number, since 2×47665985² = 4544092252040450, which contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 31445 + ... + 32925.

It is an arithmetic number, because the mean of its divisors is an integer number (3687957).

Almost surely, 2^47665985 is an apocalyptic number.

It is an amenable number.

47665985 is a deficient number, since it is larger than the sum of its proper divisors (11341327).

47665985 is a wasteful number, since it uses less digits than its factorization.

47665985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1684.

The product of its digits is 1814400, while the sum is 50.

The square root of 47665985 is about 6904.0556921276. The cubic root of 47665985 is about 362.5791757297.

The spelling of 47665985 in words is "forty-seven million, six hundred sixty-five thousand, nine hundred eighty-five".