860668691 has 2 divisors, whose sum is σ = 860668692. Its totient is φ = 860668690.

The previous prime is 860668663. The next prime is 860668733. The reversal of 860668691 is 196866068.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-860668691 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (860668621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 430334345 + 430334346.

It is an arithmetic number, because the mean of its divisors is an integer number (430334346).

Almost surely, 2^860668691 is an apocalyptic number.

860668691 is a deficient number, since it is larger than the sum of its proper divisors (1).

860668691 is an equidigital number, since it uses as much as digits as its factorization.

860668691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 50.

The square root of 860668691 is about 29337.1554687908. The cubic root of 860668691 is about 951.2149519108.

The spelling of 860668691 in words is "eight hundred sixty million, six hundred sixty-eight thousand, six hundred ninety-one".