1968613 has 2 divisors, whose sum is σ = 1968614. Its totient is φ = 1968612.

The previous prime is 1968611. The next prime is 1968641. The reversal of 1968613 is 3168691.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1855044 + 113569 = 1362^2 + 337^2 .

It is a cyclic number.

It is not a de Polignac number, because 1968613 - 2¹ = 1968611 is a prime.

Together with 1968611, 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 (1968611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 984306 + 984307.

It is an arithmetic number, because the mean of its divisors is an integer number (984307).

2^1968613 is an apocalyptic number.

It is an amenable number.

1968613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1968613 is an equidigital number, since it uses as much as digits as its factorization.

1968613 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 1968613 is about 1403.0726994707. The cubic root of 1968613 is about 125.3295411244.

The spelling of 1968613 in words is "one million, nine hundred sixty-eight thousand, six hundred thirteen".