68711138 has 8 divisors (see below), whose sum is σ = 103162332. Its totient is φ = 34323696.

The previous prime is 68711131. The next prime is 68711141. The reversal of 68711138 is 83111786.

It can be written as a sum of positive squares in 2 ways, for example, as 61512649 + 7198489 = 7843^2 + 2683^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68711098 and 68711107.

It is not an unprimeable number, because it can be changed into a prime (68711131) 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, 13145 + ... + 17612.

Almost surely, 2^68711138 is an apocalyptic number.

68711138 is a deficient number, since it is larger than the sum of its proper divisors (34451194).

68711138 is a wasteful number, since it uses less digits than its factorization.

68711138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31876.

The product of its digits is 8064, while the sum is 35.

The square root of 68711138 is about 8289.2181778501. The cubic root of 68711138 is about 409.5834317499.

The spelling of 68711138 in words is "sixty-eight million, seven hundred eleven thousand, one hundred thirty-eight".