9718913 has 2 divisors, whose sum is σ = 9718914. Its totient is φ = 9718912.

The previous prime is 9718843. The next prime is 9718931. The reversal of 9718913 is 3198179.

Together with next prime (9718931) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5626384 + 4092529 = 2372^2 + 2023^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9718913 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (9718993) by changing a digit.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4859456 + 4859457.

It is an arithmetic number, because the mean of its divisors is an integer number (4859457).

Almost surely, 2^9718913 is an apocalyptic number.

It is an amenable number.

9718913 is a deficient number, since it is larger than the sum of its proper divisors (1).

9718913 is an equidigital number, since it uses as much as digits as its factorization.

9718913 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13608, while the sum is 38.

The square root of 9718913 is about 3117.5171210436. The cubic root of 9718913 is about 213.4056425345.

The spelling of 9718913 in words is "nine million, seven hundred eighteen thousand, nine hundred thirteen".