68373905 has 8 divisors (see below), whose sum is σ = 82098792. Its totient is φ = 54665728.

The previous prime is 68373901. The next prime is 68373919. The reversal of 68373905 is 50937386.

It can be written as a sum of positive squares in 4 ways, for example, as 16072081 + 52301824 = 4009^2 + 7232^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68373905 - 2² = 68373901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68373901) 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 7 ways as a sum of consecutive naturals, for example, 8129 + ... + 14241.

It is an arithmetic number, because the mean of its divisors is an integer number (10262349).

Almost surely, 2^68373905 is an apocalyptic number.

It is an amenable number.

68373905 is a deficient number, since it is larger than the sum of its proper divisors (13724887).

68373905 is a wasteful number, since it uses less digits than its factorization.

68373905 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8355.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 68373905 is about 8268.8514921965. The cubic root of 68373905 is about 408.9122565306.

The spelling of 68373905 in words is "sixty-eight million, three hundred seventy-three thousand, nine hundred five".