43661141 has 2 divisors, whose sum is σ = 43661142. Its totient is φ = 43661140.

The previous prime is 43661119. The next prime is 43661161. The reversal of 43661141 is 14116634.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42902500 + 758641 = 6550^2 + 871^2 .

It is a cyclic number.

It is not a de Polignac number, because 43661141 - 2²² = 39466837 is a prime.

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 43661141.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43661161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21830570 + 21830571.

It is an arithmetic number, because the mean of its divisors is an integer number (21830571).

Almost surely, 2^43661141 is an apocalyptic number.

It is an amenable number.

43661141 is a deficient number, since it is larger than the sum of its proper divisors (1).

43661141 is an equidigital number, since it uses as much as digits as its factorization.

43661141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1728, while the sum is 26.

The square root of 43661141 is about 6607.6577544543. The cubic root of 43661141 is about 352.1262164667.

Adding to 43661141 its reverse (14116634), we get a palindrome (57777775).

The spelling of 43661141 in words is "forty-three million, six hundred sixty-one thousand, one hundred forty-one".