68895139 has 4 divisors (see below), whose sum is σ = 68912640. Its totient is φ = 68877640.

The previous prime is 68895133. The next prime is 68895149. The reversal of 68895139 is 93159886.

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 68895139 - 2⁷ = 68895011 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68895092 and 68895101.

It is not an unprimeable number, because it can be changed into a prime (68895133) 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 3 ways as a sum of consecutive naturals, for example, 222 + ... + 11740.

It is an arithmetic number, because the mean of its divisors is an integer number (17228160).

Almost surely, 2^68895139 is an apocalyptic number.

68895139 is a deficient number, since it is larger than the sum of its proper divisors (17501).

68895139 is a wasteful number, since it uses less digits than its factorization.

68895139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17500.

The product of its digits is 466560, while the sum is 49.

The square root of 68895139 is about 8300.3095725401. The cubic root of 68895139 is about 409.9487126011.

The spelling of 68895139 in words is "sixty-eight million, eight hundred ninety-five thousand, one hundred thirty-nine".