68857859 has 8 divisors (see below), whose sum is σ = 79803648. Its totient is φ = 58189320.

The previous prime is 68857847. The next prime is 68857889. The reversal of 68857859 is 95875886.

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

It is not a de Polignac number, because 68857859 - 2²⁴ = 52080643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68857889) 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, 68777 + ... + 69770.

It is an arithmetic number, because the mean of its divisors is an integer number (9975456).

Almost surely, 2^68857859 is an apocalyptic number.

68857859 is a deficient number, since it is larger than the sum of its proper divisors (10945789).

68857859 is a wasteful number, since it uses less digits than its factorization.

68857859 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138625.

The product of its digits is 4838400, while the sum is 56.

The square root of 68857859 is about 8298.0635692913. The cubic root of 68857859 is about 409.8747565105.

The spelling of 68857859 in words is "sixty-eight million, eight hundred fifty-seven thousand, eight hundred fifty-nine".