68316449 has 4 divisors (see below), whose sum is σ = 68402964. Its totient is φ = 68229936.

The previous prime is 68316433. The next prime is 68316461. The reversal of 68316449 is 94461386.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 22848400 + 45468049 = 4780^2 + 6743^2 .

It is a cyclic number.

It is not a de Polignac number, because 68316449 - 2⁴ = 68316433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68516449) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 42062 + ... + 43655.

It is an arithmetic number, because the mean of its divisors is an integer number (17100741).

Almost surely, 2^68316449 is an apocalyptic number.

It is an amenable number.

68316449 is a deficient number, since it is larger than the sum of its proper divisors (86515).

68316449 is an equidigital number, since it uses as much as digits as its factorization.

68316449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86514.

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

The square root of 68316449 is about 8265.3765189494. The cubic root of 68316449 is about 408.7976853033.

The spelling of 68316449 in words is "sixty-eight million, three hundred sixteen thousand, four hundred forty-nine".