68340013 has 4 divisors (see below), whose sum is σ = 78102880. Its totient is φ = 58577148.

The previous prime is 68339993. The next prime is 68340047. The reversal of 68340013 is 31004386.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 68340013 - 2⁵ = 68339981 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68340013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68340413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4881423 + ... + 4881436.

It is an arithmetic number, because the mean of its divisors is an integer number (19525720).

Almost surely, 2^68340013 is an apocalyptic number.

It is an amenable number.

68340013 is a deficient number, since it is larger than the sum of its proper divisors (9762867).

68340013 is an equidigital number, since it uses as much as digits as its factorization.

68340013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9762866.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 68340013 is about 8266.8018604537. The cubic root of 68340013 is about 408.8446813121.

Adding to 68340013 its reverse (31004386), we get a palindrome (99344399).

The spelling of 68340013 in words is "sixty-eight million, three hundred forty thousand, thirteen".