68538329 has 4 divisors (see below), whose sum is σ = 69364176. Its totient is φ = 67712484.

The previous prime is 68538307. The next prime is 68538331. The reversal of 68538329 is 92383586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68538329 is a prime.

It is a super-2 number, since 2×68538329² = 9395005084224482, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68538329.

It is not an unprimeable number, because it can be changed into a prime (68538389) 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, 412799 + ... + 412964.

It is an arithmetic number, because the mean of its divisors is an integer number (17341044).

Almost surely, 2^68538329 is an apocalyptic number.

It is an amenable number.

68538329 is a deficient number, since it is larger than the sum of its proper divisors (825847).

68538329 is an equidigital number, since it uses as much as digits as its factorization.

68538329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825846.

The product of its digits is 311040, while the sum is 44.

The square root of 68538329 is about 8278.7878943720. The cubic root of 68538329 is about 409.2397750759.

The spelling of 68538329 in words is "sixty-eight million, five hundred thirty-eight thousand, three hundred twenty-nine".