43869641 has 2 divisors, whose sum is σ = 43869642. Its totient is φ = 43869640.

The previous prime is 43869611. The next prime is 43869647. The reversal of 43869641 is 14696834.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33884041 + 9985600 = 5821^2 + 3160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43869641 is a prime.

It is not a weakly prime, because it can be changed into another prime (43869647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21934820 + 21934821.

It is an arithmetic number, because the mean of its divisors is an integer number (21934821).

Almost surely, 2^43869641 is an apocalyptic number.

It is an amenable number.

43869641 is a deficient number, since it is larger than the sum of its proper divisors (1).

43869641 is an equidigital number, since it uses as much as digits as its factorization.

43869641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 41.

The square root of 43869641 is about 6623.4161125510. The cubic root of 43869641 is about 352.6858426844.

The spelling of 43869641 in words is "forty-three million, eight hundred sixty-nine thousand, six hundred forty-one".