68143727 has 4 divisors (see below), whose sum is σ = 68293296. Its totient is φ = 67994160.

The previous prime is 68143723. The next prime is 68143781. The reversal of 68143727 is 72734186.

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 68143727 - 2² = 68143723 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68143721) 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, 74099 + ... + 75012.

It is an arithmetic number, because the mean of its divisors is an integer number (17073324).

Almost surely, 2^68143727 is an apocalyptic number.

68143727 is a deficient number, since it is larger than the sum of its proper divisors (149569).

68143727 is a wasteful number, since it uses less digits than its factorization.

68143727 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149568.

The product of its digits is 56448, while the sum is 38.

The square root of 68143727 is about 8254.9213806068. The cubic root of 68143727 is about 408.4528784324.

The spelling of 68143727 in words is "sixty-eight million, one hundred forty-three thousand, seven hundred twenty-seven".