68224447 has 4 divisors (see below), whose sum is σ = 68247256. Its totient is φ = 68201640.

The previous prime is 68224441. The next prime is 68224477. The reversal of 68224447 is 74442286.

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 68224447 - 2⁷ = 68224319 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 (68224441) 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, 6093 + ... + 13174.

It is an arithmetic number, because the mean of its divisors is an integer number (17061814).

Almost surely, 2^68224447 is an apocalyptic number.

68224447 is a deficient number, since it is larger than the sum of its proper divisors (22809).

68224447 is a wasteful number, since it uses less digits than its factorization.

68224447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22808.

The product of its digits is 86016, while the sum is 37.

The square root of 68224447 is about 8259.8091382307. The cubic root of 68224447 is about 408.6140931079.

The spelling of 68224447 in words is "sixty-eight million, two hundred twenty-four thousand, four hundred forty-seven".