860491867 has 2 divisors, whose sum is σ = 860491868. Its totient is φ = 860491866.

The previous prime is 860491777. The next prime is 860491897. The reversal of 860491867 is 768194068.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 860491867 - 2²⁷ = 726274139 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 860491867.

It is not a weakly prime, because it can be changed into another prime (860491897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430245933 + 430245934.

It is an arithmetic number, because the mean of its divisors is an integer number (430245934).

Almost surely, 2^860491867 is an apocalyptic number.

860491867 is a deficient number, since it is larger than the sum of its proper divisors (1).

860491867 is an equidigital number, since it uses as much as digits as its factorization.

860491867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 580608, while the sum is 49.

The square root of 860491867 is about 29334.1416612111. The cubic root of 860491867 is about 951.1498052194.

The spelling of 860491867 in words is "eight hundred sixty million, four hundred ninety-one thousand, eight hundred sixty-seven".