68335729 has 16 divisors (see below), whose sum is σ = 87183360. Its totient is φ = 52007760.

The previous prime is 68335693. The next prime is 68335741. The reversal of 68335729 is 92753386.

It is not a de Polignac number, because 68335729 - 2⁷ = 68335601 is a prime.

It is a super-2 number, since 2×68335729² = 9339543715922882, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (43).

It is not an unprimeable number, because it can be changed into a prime (68335759) 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 15 ways as a sum of consecutive naturals, for example, 7009 + ... + 13630.

It is an arithmetic number, because the mean of its divisors is an integer number (5448960).

Almost surely, 2^68335729 is an apocalyptic number.

It is an amenable number.

68335729 is a deficient number, since it is larger than the sum of its proper divisors (18847631).

68335729 is a wasteful number, since it uses less digits than its factorization.

68335729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20700.

The product of its digits is 272160, while the sum is 43.

The square root of 68335729 is about 8266.5427477271. The cubic root of 68335729 is about 408.8361381121.

It can be divided in two parts, 683357 and 29, that added together give a palindrome (683386).

The spelling of 68335729 in words is "sixty-eight million, three hundred thirty-five thousand, seven hundred twenty-nine".