9861613 has 2 divisors, whose sum is σ = 9861614. Its totient is φ = 9861612.

The previous prime is 9861611. The next prime is 9861619. The reversal of 9861613 is 3161689.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9715689 + 145924 = 3117^2 + 382^2 .

9861613 is a truncatable prime.

It is an emirp because it is prime and its reverse (3161689) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 9861613 - 2¹ = 9861611 is a prime.

Together with 9861611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9861611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4930806 + 4930807.

It is an arithmetic number, because the mean of its divisors is an integer number (4930807).

Almost surely, 2^9861613 is an apocalyptic number.

It is an amenable number.

9861613 is a deficient number, since it is larger than the sum of its proper divisors (1).

9861613 is an equidigital number, since it uses as much as digits as its factorization.

9861613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7776, while the sum is 34.

The square root of 9861613 is about 3140.3205250420. The cubic root of 9861613 is about 214.4450298625.

The spelling of 9861613 in words is "nine million, eight hundred sixty-one thousand, six hundred thirteen".