68524821 has 12 divisors (see below), whose sum is σ = 99119020. Its totient is φ = 45619200.

The previous prime is 68524801. The next prime is 68524847. The reversal of 68524821 is 12842586.

It can be written as a sum of positive squares in 2 ways, for example, as 49914225 + 18610596 = 7065^2 + 4314^2 .

It is not a de Polignac number, because 68524821 - 2¹⁰ = 68523797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68524801) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1971 + ... + 11871.

Almost surely, 2^68524821 is an apocalyptic number.

It is an amenable number.

68524821 is a deficient number, since it is larger than the sum of its proper divisors (30594199).

68524821 is a wasteful number, since it uses less digits than its factorization.

68524821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10676 (or 10673 counting only the distinct ones).

The product of its digits is 30720, while the sum is 36.

The square root of 68524821 is about 8277.9720342606. The cubic root of 68524821 is about 409.2128880568.

The spelling of 68524821 in words is "sixty-eight million, five hundred twenty-four thousand, eight hundred twenty-one".