68818349 has 4 divisors (see below), whose sum is σ = 69449820. Its totient is φ = 68186880.

The previous prime is 68818339. The next prime is 68818381. The reversal of 68818349 is 94381886.

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 50268100 + 18550249 = 7090^2 + 4307^2 .

It is a cyclic number.

It is not a de Polignac number, because 68818349 - 2⁴ = 68818333 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68818319) 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, 315572 + ... + 315789.

It is an arithmetic number, because the mean of its divisors is an integer number (17362455).

Almost surely, 2^68818349 is an apocalyptic number.

It is an amenable number.

68818349 is a deficient number, since it is larger than the sum of its proper divisors (631471).

68818349 is a wasteful number, since it uses less digits than its factorization.

68818349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 631470.

The product of its digits is 331776, while the sum is 47.

The square root of 68818349 is about 8295.6825517856. The cubic root of 68818349 is about 409.7963474023.

The spelling of 68818349 in words is "sixty-eight million, eight hundred eighteen thousand, three hundred forty-nine".