47667681 has 6 divisors (see below), whose sum is σ = 68853330. Its totient is φ = 31778448.

The previous prime is 47667673. The next prime is 47667689. The reversal of 47667681 is 18676674.

It is an interprime number because it is at equal distance from previous prime (47667673) and next prime (47667689).

It can be written as a sum of positive squares in only one way, i.e., 37933281 + 9734400 = 6159^2 + 3120^2 .

It is not a de Polignac number, because 47667681 - 2³ = 47667673 is a prime.

It is a super-2 number, since 2×47667681² = 4544415623835522, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47667689) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2648196 + ... + 2648213.

It is an arithmetic number, because the mean of its divisors is an integer number (11475555).

Almost surely, 2^47667681 is an apocalyptic number.

It is an amenable number.

47667681 is a deficient number, since it is larger than the sum of its proper divisors (21185649).

47667681 is a wasteful number, since it uses less digits than its factorization.

47667681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5296415 (or 5296412 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 47667681 is about 6904.1785173908. The cubic root of 47667681 is about 362.5834759799.

The spelling of 47667681 in words is "forty-seven million, six hundred sixty-seven thousand, six hundred eighty-one".