43636349 has 2 divisors, whose sum is σ = 43636350. Its totient is φ = 43636348.

The previous prime is 43636321. The next prime is 43636379. The reversal of 43636349 is 94363634.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38875225 + 4761124 = 6235^2 + 2182^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43636349 is a prime.

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

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43636319) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21818174 + 21818175.

It is an arithmetic number, because the mean of its divisors is an integer number (21818175).

Almost surely, 2^43636349 is an apocalyptic number.

It is an amenable number.

43636349 is a deficient number, since it is larger than the sum of its proper divisors (1).

43636349 is an equidigital number, since it uses as much as digits as its factorization.

43636349 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 38.

The square root of 43636349 is about 6605.7814829133. The cubic root of 43636349 is about 352.0595548553.

The spelling of 43636349 in words is "forty-three million, six hundred thirty-six thousand, three hundred forty-nine".