860661517 has 2 divisors, whose sum is σ = 860661518. Its totient is φ = 860661516.

The previous prime is 860661467. The next prime is 860661539. The reversal of 860661517 is 715166068.

860661517 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 607819716 + 252841801 = 24654^2 + 15901^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-860661517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 860661517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (860661547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430330758 + 430330759.

It is an arithmetic number, because the mean of its divisors is an integer number (430330759).

Almost surely, 2^860661517 is an apocalyptic number.

It is an amenable number.

860661517 is a deficient number, since it is larger than the sum of its proper divisors (1).

860661517 is an equidigital number, since it uses as much as digits as its factorization.

860661517 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 860661517 is about 29337.0332003766. The cubic root of 860661517 is about 951.2123089909.

The spelling of 860661517 in words is "eight hundred sixty million, six hundred sixty-one thousand, five hundred seventeen".