43669643 has 2 divisors, whose sum is σ = 43669644. Its totient is φ = 43669642.

The previous prime is 43669601. The next prime is 43669649. The reversal of 43669643 is 34696634.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43669643 - 2¹⁸ = 43407499 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 43669643.

It is not a weakly prime, because it can be changed into another prime (43669649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21834821 + 21834822.

It is an arithmetic number, because the mean of its divisors is an integer number (21834822).

Almost surely, 2^43669643 is an apocalyptic number.

43669643 is a deficient number, since it is larger than the sum of its proper divisors (1).

43669643 is an equidigital number, since it uses as much as digits as its factorization.

43669643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 279936, while the sum is 41.

The square root of 43669643 is about 6608.3010675967. The cubic root of 43669643 is about 352.1490711358.

The spelling of 43669643 in words is "forty-three million, six hundred sixty-nine thousand, six hundred forty-three".