68724443 has 4 divisors (see below), whose sum is σ = 68742768. Its totient is φ = 68706120.

The previous prime is 68724431. The next prime is 68724473. The reversal of 68724443 is 34442786.

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

It is a cyclic number.

It is not a de Polignac number, because 68724443 - 2¹² = 68720347 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68724397 and 68724406.

It is not an unprimeable number, because it can be changed into a prime (68724473) 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 3 ways as a sum of consecutive naturals, for example, 1271 + ... + 11792.

It is an arithmetic number, because the mean of its divisors is an integer number (17185692).

Almost surely, 2^68724443 is an apocalyptic number.

68724443 is a deficient number, since it is larger than the sum of its proper divisors (18325).

68724443 is a wasteful number, since it uses less digits than its factorization.

68724443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18324.

The product of its digits is 129024, while the sum is 38.

The square root of 68724443 is about 8290.0206875496. The cubic root of 68724443 is about 409.6098668424.

The spelling of 68724443 in words is "sixty-eight million, seven hundred twenty-four thousand, four hundred forty-three".