43004681 has 2 divisors, whose sum is σ = 43004682. Its totient is φ = 43004680.

The previous prime is 43004669. The next prime is 43004683. The reversal of 43004681 is 18640034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30691600 + 12313081 = 5540^2 + 3509^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43004681 is a prime.

It is a super-2 number, since 2×43004681² = 3698805175823522, which contains 22 as substring.

Together with 43004683, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43004681.

It is not a weakly prime, because it can be changed into another prime (43004683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21502340 + 21502341.

It is an arithmetic number, because the mean of its divisors is an integer number (21502341).

Almost surely, 2^43004681 is an apocalyptic number.

It is an amenable number.

43004681 is a deficient number, since it is larger than the sum of its proper divisors (1).

43004681 is an equidigital number, since it uses as much as digits as its factorization.

43004681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 43004681 is about 6557.7954374927. The cubic root of 43004681 is about 350.3525182955.

The spelling of 43004681 in words is "forty-three million, four thousand, six hundred eighty-one".