985386917 has 2 divisors, whose sum is σ = 985386918. Its totient is φ = 985386916.

The previous prime is 985386893. The next prime is 985386937. The reversal of 985386917 is 719683589.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 876100801 + 109286116 = 29599^2 + 10454^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-985386917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (985386937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 492693458 + 492693459.

It is an arithmetic number, because the mean of its divisors is an integer number (492693459).

Almost surely, 2^985386917 is an apocalyptic number.

It is an amenable number.

985386917 is a deficient number, since it is larger than the sum of its proper divisors (1).

985386917 is an equidigital number, since it uses as much as digits as its factorization.

985386917 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3265920, while the sum is 56.

The square root of 985386917 is about 31390.8731480983. The cubic root of 985386917 is about 995.1050509018.

The spelling of 985386917 in words is "nine hundred eighty-five million, three hundred eighty-six thousand, nine hundred seventeen".