68813449 has 4 divisors (see below), whose sum is σ = 69522964. Its totient is φ = 68103936.

The previous prime is 68813443. The next prime is 68813471. The reversal of 68813449 is 94431886.

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 38837824 + 29975625 = 6232^2 + 5475^2 .

It is a cyclic number.

It is not a de Polignac number, because 68813449 - 2³ = 68813441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68813441) 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, 354612 + ... + 354805.

It is an arithmetic number, because the mean of its divisors is an integer number (17380741).

Almost surely, 2^68813449 is an apocalyptic number.

It is an amenable number.

68813449 is a deficient number, since it is larger than the sum of its proper divisors (709515).

68813449 is an equidigital number, since it uses as much as digits as its factorization.

68813449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709514.

The product of its digits is 165888, while the sum is 43.

The square root of 68813449 is about 8295.3872121800. The cubic root of 68813449 is about 409.7866210730.

The spelling of 68813449 in words is "sixty-eight million, eight hundred thirteen thousand, four hundred forty-nine".