42944647 has 2 divisors, whose sum is σ = 42944648. Its totient is φ = 42944646.

The previous prime is 42944593. The next prime is 42944653. The reversal of 42944647 is 74644924.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42944647 - 2¹⁵ = 42911879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42944677) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21472323 + 21472324.

It is an arithmetic number, because the mean of its divisors is an integer number (21472324).

Almost surely, 2^42944647 is an apocalyptic number.

42944647 is a deficient number, since it is larger than the sum of its proper divisors (1).

42944647 is an equidigital number, since it uses as much as digits as its factorization.

42944647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 193536, while the sum is 40.

The square root of 42944647 is about 6553.2165384641. The cubic root of 42944647 is about 350.1894131211.

The spelling of 42944647 in words is "forty-two million, nine hundred forty-four thousand, six hundred forty-seven".