68142905 has 8 divisors (see below), whose sum is σ = 85326912. Its totient is φ = 52144048.

The previous prime is 68142901. The next prime is 68142913. The reversal of 68142905 is 50924186.

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 68142905 - 2² = 68142901 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68142901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 296159 + ... + 296388.

It is an arithmetic number, because the mean of its divisors is an integer number (10665864).

Almost surely, 2^68142905 is an apocalyptic number.

It is an amenable number.

68142905 is a deficient number, since it is larger than the sum of its proper divisors (17184007).

68142905 is a wasteful number, since it uses less digits than its factorization.

68142905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 592575.

The product of its (nonzero) digits is 17280, while the sum is 35.

The square root of 68142905 is about 8254.8715919753. The cubic root of 68142905 is about 408.4512360723.

The spelling of 68142905 in words is "sixty-eight million, one hundred forty-two thousand, nine hundred five".