860091231117869 has 2 divisors, whose sum is σ = 860091231117870. Its totient is φ = 860091231117868.

The previous prime is 860091231117863. The next prime is 860091231117913. The reversal of 860091231117869 is 968711132190068.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 845004609895369 + 15086621222500 = 29068963^2 + 3884150^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-860091231117869 is a prime.

It is a super-2 number, since 2×860091231117869² (a number of 31 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (860091231117863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430045615558934 + 430045615558935.

It is an arithmetic number, because the mean of its divisors is an integer number (430045615558935).

Almost surely, 2^{860091231117869} is an apocalyptic number.

It is an amenable number.

860091231117869 is a deficient number, since it is larger than the sum of its proper divisors (1).

860091231117869 is an equidigital number, since it uses as much as digits as its factorization.

860091231117869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7838208, while the sum is 62.

The spelling of 860091231117869 in words is "eight hundred sixty trillion, ninety-one billion, two hundred thirty-one million, one hundred seventeen thousand, eight hundred sixty-nine".