42943647 has 8 divisors (see below), whose sum is σ = 57323056. Its totient is φ = 28596672.

The previous prime is 42943639. The next prime is 42943651. The reversal of 42943647 is 74634924.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42943647 - 2³ = 42943639 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42943697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4828 + ... + 10449.

It is an arithmetic number, because the mean of its divisors is an integer number (7165382).

Almost surely, 2^42943647 is an apocalyptic number.

42943647 is a deficient number, since it is larger than the sum of its proper divisors (14379409).

42943647 is a wasteful number, since it uses less digits than its factorization.

42943647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16217.

The product of its digits is 145152, while the sum is 39.

The square root of 42943647 is about 6553.1402396103. The cubic root of 42943647 is about 350.1866949544.

The spelling of 42943647 in words is "forty-two million, nine hundred forty-three thousand, six hundred forty-seven".