916666687 has 2 divisors, whose sum is σ = 916666688. Its totient is φ = 916666686.

The previous prime is 916666661. The next prime is 916666693. The reversal of 916666687 is 786666619.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-916666687 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (916666627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 458333343 + 458333344.

It is an arithmetic number, because the mean of its divisors is an integer number (458333344).

Almost surely, 2^916666687 is an apocalyptic number.

916666687 is a deficient number, since it is larger than the sum of its proper divisors (1).

916666687 is an equidigital number, since it uses as much as digits as its factorization.

916666687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3919104, while the sum is 55.

The square root of 916666687 is about 30276.5038767689. The cubic root of 916666687 is about 971.4127877245.

The spelling of 916666687 in words is "nine hundred sixteen million, six hundred sixty-six thousand, six hundred eighty-seven".