68329021 has 16 divisors (see below), whose sum is σ = 74257920. Its totient is φ = 62702640.

The previous prime is 68329013. The next prime is 68329039. The reversal of 68329021 is 12092386.

It is a cyclic number.

It is not a de Polignac number, because 68329021 - 2³ = 68329013 is a prime.

It is a super-2 number, since 2×68329021² = 9337710221636882, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68329721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57766 + ... + 58936.

It is an arithmetic number, because the mean of its divisors is an integer number (4641120).

Almost surely, 2^68329021 is an apocalyptic number.

It is an amenable number.

68329021 is a deficient number, since it is larger than the sum of its proper divisors (5928899).

68329021 is a wasteful number, since it uses less digits than its factorization.

68329021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1296.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 68329021 is about 8266.1370058813. The cubic root of 68329021 is about 408.8227602271.

The spelling of 68329021 in words is "sixty-eight million, three hundred twenty-nine thousand, twenty-one".