43676561 has 2 divisors, whose sum is σ = 43676562. Its totient is φ = 43676560.

The previous prime is 43676513. The next prime is 43676569. The reversal of 43676561 is 16567634.

It is a happy number.

43676561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26204161 + 17472400 = 5119^2 + 4180^2 .

It is a cyclic number.

It is not a de Polignac number, because 43676561 - 2²² = 39482257 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (43676569) by changing a digit.

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 as a sum of consecutive naturals, namely, 21838280 + 21838281.

It is an arithmetic number, because the mean of its divisors is an integer number (21838281).

Almost surely, 2^43676561 is an apocalyptic number.

It is an amenable number.

43676561 is a deficient number, since it is larger than the sum of its proper divisors (1).

43676561 is an equidigital number, since it uses as much as digits as its factorization.

43676561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 38.

The square root of 43676561 is about 6608.8244794366. The cubic root of 43676561 is about 352.1676655832.

The spelling of 43676561 in words is "forty-three million, six hundred seventy-six thousand, five hundred sixty-one".