68783213 has 4 divisors (see below), whose sum is σ = 69392028. Its totient is φ = 68174400.

The previous prime is 68783161. The next prime is 68783219. The reversal of 68783213 is 31238786.

It is a happy number.

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 4831204 + 63952009 = 2198^2 + 7997^2 .

It is a cyclic number.

It is not a de Polignac number, because 68783213 - 2¹⁸ = 68521069 is a prime.

It is a super-3 number, since 3×68783213³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68783219) 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, 304238 + ... + 304463.

It is an arithmetic number, because the mean of its divisors is an integer number (17348007).

Almost surely, 2^68783213 is an apocalyptic number.

It is an amenable number.

68783213 is a deficient number, since it is larger than the sum of its proper divisors (608815).

68783213 is a wasteful number, since it uses less digits than its factorization.

68783213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608814.

The product of its digits is 48384, while the sum is 38.

The square root of 68783213 is about 8293.5645533148. The cubic root of 68783213 is about 409.7265934494.

The spelling of 68783213 in words is "sixty-eight million, seven hundred eighty-three thousand, two hundred thirteen".