68129767 has 4 divisors (see below), whose sum is σ = 68895360. Its totient is φ = 67364176.

The previous prime is 68129669. The next prime is 68129777. The reversal of 68129767 is 76792186.

It is a happy number.

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 68129767 - 2⁷ = 68129639 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 (68129777) 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, 382663 + ... + 382840.

It is an arithmetic number, because the mean of its divisors is an integer number (17223840).

Almost surely, 2^68129767 is an apocalyptic number.

68129767 is a deficient number, since it is larger than the sum of its proper divisors (765593).

68129767 is an equidigital number, since it uses as much as digits as its factorization.

68129767 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 765592.

The product of its digits is 254016, while the sum is 46.

The square root of 68129767 is about 8254.0757810914. The cubic root of 68129767 is about 408.4249844899.

The spelling of 68129767 in words is "sixty-eight million, one hundred twenty-nine thousand, seven hundred sixty-seven".