68449613 has 2 divisors, whose sum is σ = 68449614. Its totient is φ = 68449612.

The previous prime is 68449583. The next prime is 68449651. The reversal of 68449613 is 31694486.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64048009 + 4401604 = 8003^2 + 2098^2 .

It is a cyclic number.

It is not a de Polignac number, because 68449613 - 2¹⁶ = 68384077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68449673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34224806 + 34224807.

It is an arithmetic number, because the mean of its divisors is an integer number (34224807).

Almost surely, 2^68449613 is an apocalyptic number.

It is an amenable number.

68449613 is a deficient number, since it is larger than the sum of its proper divisors (1).

68449613 is an equidigital number, since it uses as much as digits as its factorization.

68449613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 41.

The square root of 68449613 is about 8273.4281286538. The cubic root of 68449613 is about 409.0631255400.

The spelling of 68449613 in words is "sixty-eight million, four hundred forty-nine thousand, six hundred thirteen".