68173913 has 4 divisors (see below), whose sum is σ = 68194560. Its totient is φ = 68153268.

The previous prime is 68173901. The next prime is 68173967. The reversal of 68173913 is 31937186.

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 68173913 - 2⁶ = 68173849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68173993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4133 + ... + 12386.

It is an arithmetic number, because the mean of its divisors is an integer number (17048640).

Almost surely, 2^68173913 is an apocalyptic number.

It is an amenable number.

68173913 is a deficient number, since it is larger than the sum of its proper divisors (20647).

68173913 is a wasteful number, since it uses less digits than its factorization.

68173913 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20646.

The product of its digits is 27216, while the sum is 38.

The square root of 68173913 is about 8256.7495420413. The cubic root of 68173913 is about 408.5131810653.

The spelling of 68173913 in words is "sixty-eight million, one hundred seventy-three thousand, nine hundred thirteen".