68129747 has 16 divisors (see below), whose sum is σ = 79833600. Its totient is φ = 58116744.

The previous prime is 68129669. The next prime is 68129777. The reversal of 68129747 is 74792186.

It is not a de Polignac number, because 68129747 - 2⁸ = 68129491 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 68129698 and 68129707.

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 15 ways as a sum of consecutive naturals, for example, 104978 + ... + 105624.

It is an arithmetic number, because the mean of its divisors is an integer number (4989600).

Almost surely, 2^68129747 is an apocalyptic number.

68129747 is a deficient number, since it is larger than the sum of its proper divisors (11703853).

68129747 is an equidigital number, since it uses as much as digits as its factorization.

68129747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 975 (or 961 counting only the distinct ones).

The product of its digits is 169344, while the sum is 44.

The square root of 68129747 is about 8254.0745695687. The cubic root of 68129747 is about 408.4249445245.

The spelling of 68129747 in words is "sixty-eight million, one hundred twenty-nine thousand, seven hundred forty-seven".