42307717 has 2 divisors, whose sum is σ = 42307718. Its totient is φ = 42307716.

The previous prime is 42307697. The next prime is 42307721. The reversal of 42307717 is 71770324.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21958596 + 20349121 = 4686^2 + 4511^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42307717 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42307757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21153858 + 21153859.

It is an arithmetic number, because the mean of its divisors is an integer number (21153859).

Almost surely, 2^42307717 is an apocalyptic number.

It is an amenable number.

42307717 is a deficient number, since it is larger than the sum of its proper divisors (1).

42307717 is an equidigital number, since it uses as much as digits as its factorization.

42307717 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8232, while the sum is 31.

The square root of 42307717 is about 6504.4382539924. The cubic root of 42307717 is about 348.4495143437.

The spelling of 42307717 in words is "forty-two million, three hundred seven thousand, seven hundred seventeen".