68028929 has 4 divisors (see below), whose sum is σ = 68053440. Its totient is φ = 68004420.

The previous prime is 68028899. The next prime is 68028937. The reversal of 68028929 is 92982086.

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 not a de Polignac number, because 68028929 - 2⁸ = 68028673 is a prime.

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 68028929.

It is not an unprimeable number, because it can be changed into a prime (68028329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7469 + ... + 13850.

It is an arithmetic number, because the mean of its divisors is an integer number (17013360).

Almost surely, 2^68028929 is an apocalyptic number.

It is an amenable number.

68028929 is a deficient number, since it is larger than the sum of its proper divisors (24511).

68028929 is a wasteful number, since it uses less digits than its factorization.

68028929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24510.

The product of its (nonzero) digits is 124416, while the sum is 44.

The square root of 68028929 is about 8247.9651429913. The cubic root of 68028929 is about 408.2233834564.

The spelling of 68028929 in words is "sixty-eight million, twenty-eight thousand, nine hundred twenty-nine".