42939747 has 16 divisors (see below), whose sum is σ = 63866880. Its totient is φ = 28512936.

The previous prime is 42939737. The next prime is 42939769. The reversal of 42939747 is 74793924.

It is a de Polignac number, because none of the positive numbers 2^k-42939747 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42939707) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4078 + ... + 10124.

It is an arithmetic number, because the mean of its divisors is an integer number (3991680).

Almost surely, 2^42939747 is an apocalyptic number.

42939747 is a deficient number, since it is larger than the sum of its proper divisors (20927133).

42939747 is a wasteful number, since it uses less digits than its factorization.

42939747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6319 (or 6313 counting only the distinct ones).

The product of its digits is 381024, while the sum is 45.

The square root of 42939747 is about 6552.8426655918. The cubic root of 42939747 is about 350.1760937009.

The spelling of 42939747 in words is "forty-two million, nine hundred thirty-nine thousand, seven hundred forty-seven".