68574821 has 32 divisors (see below), whose sum is σ = 88750080. Its totient is φ = 51609600.

The previous prime is 68574811. The next prime is 68574827. The reversal of 68574821 is 12847586.

It is not a de Polignac number, because 68574821 - 2¹⁰ = 68573797 is a prime.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68574827) 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 31 ways as a sum of consecutive naturals, for example, 106661 + ... + 107301.

It is an arithmetic number, because the mean of its divisors is an integer number (2773440).

Almost surely, 2^68574821 is an apocalyptic number.

It is an amenable number.

68574821 is a deficient number, since it is larger than the sum of its proper divisors (20175259).

68574821 is a wasteful number, since it uses less digits than its factorization.

68574821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725.

The product of its digits is 107520, while the sum is 41.

The square root of 68574821 is about 8280.9915469103. The cubic root of 68574821 is about 409.3123929742.

The spelling of 68574821 in words is "sixty-eight million, five hundred seventy-four thousand, eight hundred twenty-one".