68147329 has 4 divisors (see below), whose sum is σ = 68430340. Its totient is φ = 67864320.

The previous prime is 68147251. The next prime is 68147333. The reversal of 68147329 is 92374186.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 50908225 + 17239104 = 7135^2 + 4152^2 .

It is a cyclic number.

It is not a de Polignac number, because 68147329 - 2⁷ = 68147201 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68147291 and 68147300.

It is not an unprimeable number, because it can be changed into a prime (68147929) 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 3 ways as a sum of consecutive naturals, for example, 141144 + ... + 141625.

It is an arithmetic number, because the mean of its divisors is an integer number (17107585).

Almost surely, 2^68147329 is an apocalyptic number.

It is an amenable number.

68147329 is a deficient number, since it is larger than the sum of its proper divisors (283011).

68147329 is a wasteful number, since it uses less digits than its factorization.

68147329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 283010.

The product of its digits is 72576, while the sum is 40.

The square root of 68147329 is about 8255.1395506072. The cubic root of 68147329 is about 408.4600750906.

The spelling of 68147329 in words is "sixty-eight million, one hundred forty-seven thousand, three hundred twenty-nine".