68724427 has 4 divisors (see below), whose sum is σ = 70941376. Its totient is φ = 66507480.

The previous prime is 68724377. The next prime is 68724431. The reversal of 68724427 is 72442786.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68724427 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 68724427.

It is not an unprimeable number, because it can be changed into a prime (68724127) 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, 1108428 + ... + 1108489.

It is an arithmetic number, because the mean of its divisors is an integer number (17735344).

Almost surely, 2^68724427 is an apocalyptic number.

68724427 is a deficient number, since it is larger than the sum of its proper divisors (2216949).

68724427 is a wasteful number, since it uses less digits than its factorization.

68724427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2216948.

The product of its digits is 150528, while the sum is 40.

The square root of 68724427 is about 8290.0197225338. The cubic root of 68724427 is about 409.6098350548.

The spelling of 68724427 in words is "sixty-eight million, seven hundred twenty-four thousand, four hundred twenty-seven".