68818213 has 8 divisors (see below), whose sum is σ = 70643160. Its totient is φ = 67000320.

The previous prime is 68818177. The next prime is 68818223. The reversal of 68818213 is 31281886.

It can be written as a sum of positive squares in 4 ways, for example, as 26399044 + 42419169 = 5138^2 + 6513^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68818213 - 2⁹ = 68817701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68818223) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22203 + ... + 25111.

It is an arithmetic number, because the mean of its divisors is an integer number (8830395).

Almost surely, 2^68818213 is an apocalyptic number.

It is an amenable number.

68818213 is a deficient number, since it is larger than the sum of its proper divisors (1824947).

68818213 is a wasteful number, since it uses less digits than its factorization.

68818213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3527.

The product of its digits is 18432, while the sum is 37.

The square root of 68818213 is about 8295.6743547466. The cubic root of 68818213 is about 409.7960774532.

The spelling of 68818213 in words is "sixty-eight million, eight hundred eighteen thousand, two hundred thirteen".