47866865 has 4 divisors (see below), whose sum is σ = 57440244. Its totient is φ = 38293488.

The previous prime is 47866853. The next prime is 47866867. The reversal of 47866865 is 56866874.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 56866874 = 2 ⋅28433437.

It can be written as a sum of positive squares in 2 ways, for example, as 37258816 + 10608049 = 6104^2 + 3257^2 .

It is a cyclic number.

It is not a de Polignac number, because 47866865 - 2¹⁰ = 47865841 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47866867) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4786682 + ... + 4786691.

It is an arithmetic number, because the mean of its divisors is an integer number (14360061).

Almost surely, 2^47866865 is an apocalyptic number.

It is an amenable number.

47866865 is a deficient number, since it is larger than the sum of its proper divisors (9573379).

47866865 is an equidigital number, since it uses as much as digits as its factorization.

47866865 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9573378.

The product of its digits is 1935360, while the sum is 50.

The square root of 47866865 is about 6918.5883675790. The cubic root of 47866865 is about 363.0878041714.

Subtracting 47866865 from its reverse (56866874), we obtain a palindrome (9000009).

The spelling of 47866865 in words is "forty-seven million, eight hundred sixty-six thousand, eight hundred sixty-five".