68605813 has 4 divisors (see below), whose sum is σ = 69099520. Its totient is φ = 68112108.

The previous prime is 68605811. The next prime is 68605837. The reversal of 68605813 is 31850686.

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 a cyclic number.

It is not a de Polignac number, because 68605813 - 2¹ = 68605811 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 (68605811) 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, 246645 + ... + 246922.

It is an arithmetic number, because the mean of its divisors is an integer number (17274880).

Almost surely, 2^68605813 is an apocalyptic number.

It is an amenable number.

68605813 is a deficient number, since it is larger than the sum of its proper divisors (493707).

68605813 is a wasteful number, since it uses less digits than its factorization.

68605813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 493706.

The product of its (nonzero) digits is 34560, while the sum is 37.

The square root of 68605813 is about 8282.8626090259. The cubic root of 68605813 is about 409.3740458226.

The spelling of 68605813 in words is "sixty-eight million, six hundred five thousand, eight hundred thirteen".