68928013 has 24 divisors (see below), whose sum is σ = 91699776. Its totient is φ = 50540160.

The previous prime is 68928001. The next prime is 68928019. The reversal of 68928013 is 31082986.

It is not a de Polignac number, because 68928013 - 2⁵ = 68927981 is a prime.

It is a super-2 number, since 2×68928013² = 9502141952256338, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68928019) 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 23 ways as a sum of consecutive naturals, for example, 12006 + ... + 16792.

It is an arithmetic number, because the mean of its divisors is an integer number (3820824).

Almost surely, 2^68928013 is an apocalyptic number.

It is an amenable number.

68928013 is a deficient number, since it is larger than the sum of its proper divisors (22771763).

68928013 is a wasteful number, since it uses less digits than its factorization.

68928013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4833 (or 4822 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 68928013 is about 8302.2896239531. The cubic root of 68928013 is about 410.0139059333.

The spelling of 68928013 in words is "sixty-eight million, nine hundred twenty-eight thousand, thirteen".