42709747 has 2 divisors, whose sum is σ = 42709748. Its totient is φ = 42709746.

The previous prime is 42709717. The next prime is 42709759. The reversal of 42709747 is 74790724.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42709747 is a prime.

It is not a weakly prime, because it can be changed into another prime (42709717) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21354873 + 21354874.

It is an arithmetic number, because the mean of its divisors is an integer number (21354874).

Almost surely, 2^42709747 is an apocalyptic number.

42709747 is a deficient number, since it is larger than the sum of its proper divisors (1).

42709747 is an equidigital number, since it uses as much as digits as its factorization.

42709747 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 98784, while the sum is 40.

The square root of 42709747 is about 6535.2694665178. The cubic root of 42709747 is about 349.5497530144.

The spelling of 42709747 in words is "forty-two million, seven hundred nine thousand, seven hundred forty-seven".