68138741 has 8 divisors (see below), whose sum is σ = 75070368. Its totient is φ = 61330000.

The previous prime is 68138729. The next prime is 68138747. The reversal of 68138741 is 14783186.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68138741 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 68138695 and 68138704.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68138747) 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, 29555 + ... + 31776.

It is an arithmetic number, because the mean of its divisors is an integer number (9383796).

Almost surely, 2^68138741 is an apocalyptic number.

It is an amenable number.

68138741 is a deficient number, since it is larger than the sum of its proper divisors (6931627).

68138741 is a wasteful number, since it uses less digits than its factorization.

68138741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61443.

The product of its digits is 32256, while the sum is 38.

The square root of 68138741 is about 8254.6193734175. The cubic root of 68138741 is about 408.4429161765.

The spelling of 68138741 in words is "sixty-eight million, one hundred thirty-eight thousand, seven hundred forty-one".