239650172717 has 2 divisors, whose sum is σ = 239650172718. Its totient is φ = 239650172716.

The previous prime is 239650172543. The next prime is 239650172731. The reversal of 239650172717 is 717271056932.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 238562888041 + 1087284676 = 488429^2 + 32974^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-239650172717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (239650172317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119825086358 + 119825086359.

It is an arithmetic number, because the mean of its divisors is an integer number (119825086359).

Almost surely, 2^239650172717 is an apocalyptic number.

It is an amenable number.

239650172717 is a deficient number, since it is larger than the sum of its proper divisors (1).

239650172717 is an equidigital number, since it uses as much as digits as its factorization.

239650172717 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1111320, while the sum is 50.

The spelling of 239650172717 in words is "two hundred thirty-nine billion, six hundred fifty million, one hundred seventy-two thousand, seven hundred seventeen".