68285139 has 8 divisors (see below), whose sum is σ = 98050512. Its totient is φ = 42021600.

The previous prime is 68285117. The next prime is 68285143. The reversal of 68285139 is 93158286.

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

It is not a de Polignac number, because 68285139 - 2⁷ = 68285011 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 68285139.

It is not an unprimeable number, because it can be changed into a prime (68285939) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 875412 + ... + 875489.

It is an arithmetic number, because the mean of its divisors is an integer number (12256314).

Almost surely, 2^68285139 is an apocalyptic number.

68285139 is a deficient number, since it is larger than the sum of its proper divisors (29765373).

68285139 is a wasteful number, since it uses less digits than its factorization.

68285139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750917.

The product of its digits is 103680, while the sum is 42.

The square root of 68285139 is about 8263.4822562888. The cubic root of 68285139 is about 408.7352239606.

The spelling of 68285139 in words is "sixty-eight million, two hundred eighty-five thousand, one hundred thirty-nine".