68082013 has 4 divisors (see below), whose sum is σ = 68579100. Its totient is φ = 67584928.

The previous prime is 68082011. The next prime is 68082019. The reversal of 68082013 is 31028086.

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 51451929 + 16630084 = 7173^2 + 4078^2 .

It is a cyclic number.

It is not a de Polignac number, because 68082013 - 2¹ = 68082011 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 (68082011) 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, 248338 + ... + 248611.

It is an arithmetic number, because the mean of its divisors is an integer number (17144775).

Almost surely, 2^68082013 is an apocalyptic number.

It is an amenable number.

68082013 is a deficient number, since it is larger than the sum of its proper divisors (497087).

68082013 is a wasteful number, since it uses less digits than its factorization.

68082013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497086.

The product of its (nonzero) digits is 2304, while the sum is 28.

The square root of 68082013 is about 8251.1825213117. The cubic root of 68082013 is about 408.3295368058.

The spelling of 68082013 in words is "sixty-eight million, eighty-two thousand, thirteen".