47843681 has 4 divisors (see below), whose sum is σ = 47860164. Its totient is φ = 47827200.

The previous prime is 47843671. The next prime is 47843687. The reversal of 47843681 is 18634874.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 32672656 + 15171025 = 5716^2 + 3895^2 .

It is a cyclic number.

It is not a de Polignac number, because 47843681 - 2¹⁸ = 47581537 is a prime.

It is a super-2 number, since 2×47843681² = 4578035623259522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47843687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2600 + ... + 10121.

It is an arithmetic number, because the mean of its divisors is an integer number (11965041).

Almost surely, 2^47843681 is an apocalyptic number.

It is an amenable number.

47843681 is a deficient number, since it is larger than the sum of its proper divisors (16483).

47843681 is a wasteful number, since it uses less digits than its factorization.

47843681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16482.

The product of its digits is 129024, while the sum is 41.

The square root of 47843681 is about 6916.9126783559. The cubic root of 47843681 is about 363.0291749780.

The spelling of 47843681 in words is "forty-seven million, eight hundred forty-three thousand, six hundred eighty-one".