43642873 has 2 divisors, whose sum is σ = 43642874. Its totient is φ = 43642872.

The previous prime is 43642861. The next prime is 43642909. The reversal of 43642873 is 37824634.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43599609 + 43264 = 6603^2 + 208^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43642873 is a prime.

It is not a weakly prime, because it can be changed into another prime (43642853) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21821436 + 21821437.

It is an arithmetic number, because the mean of its divisors is an integer number (21821437).

Almost surely, 2^43642873 is an apocalyptic number.

It is an amenable number.

43642873 is a deficient number, since it is larger than the sum of its proper divisors (1).

43642873 is an equidigital number, since it uses as much as digits as its factorization.

43642873 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 37.

The square root of 43642873 is about 6606.2752743131. The cubic root of 43642873 is about 352.0770992660.

The spelling of 43642873 in words is "forty-three million, six hundred forty-two thousand, eight hundred seventy-three".