68724001 has 4 divisors (see below), whose sum is σ = 69332292. Its totient is φ = 68115712.

The previous prime is 68723989. The next prime is 68724031. The reversal of 68724001 is 10042786.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5997601 + 62726400 = 2449^2 + 7920^2 .

It is a cyclic number.

It is not a de Polignac number, because 68724001 - 2⁹ = 68723489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (68724031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303976 + ... + 304201.

It is an arithmetic number, because the mean of its divisors is an integer number (17333073).

Almost surely, 2^68724001 is an apocalyptic number.

It is an amenable number.

68724001 is a deficient number, since it is larger than the sum of its proper divisors (608291).

68724001 is a wasteful number, since it uses less digits than its factorization.

68724001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 608290.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 68724001 is about 8289.9940289484. The cubic root of 68724001 is about 409.6089887077.

Adding to 68724001 its reverse (10042786), we get a palindrome (78766787).

The spelling of 68724001 in words is "sixty-eight million, seven hundred twenty-four thousand, one".