68827139 has 4 divisors (see below), whose sum is σ = 72449640. Its totient is φ = 65204640.

The previous prime is 68827097. The next prime is 68827153. The reversal of 68827139 is 93172886.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 68827139 - 2⁸ = 68826883 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68827139.

It is not an unprimeable number, because it can be changed into a prime (68827439) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1811222 + ... + 1811259.

It is an arithmetic number, because the mean of its divisors is an integer number (18112410).

Almost surely, 2^68827139 is an apocalyptic number.

68827139 is a deficient number, since it is larger than the sum of its proper divisors (3622501).

68827139 is a wasteful number, since it uses less digits than its factorization.

68827139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3622500.

The product of its digits is 145152, while the sum is 44.

The square root of 68827139 is about 8296.2123285268. The cubic root of 68827139 is about 409.8137940890.

The spelling of 68827139 in words is "sixty-eight million, eight hundred twenty-seven thousand, one hundred thirty-nine".