68719447 has 4 divisors (see below), whose sum is σ = 72336280. Its totient is φ = 65102616.

The previous prime is 68719439. The next prime is 68719459. The reversal of 68719447 is 74491786.

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 68719447 - 2³ = 68719439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 68719397 and 68719406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68759447) 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, 1808388 + ... + 1808425.

It is an arithmetic number, because the mean of its divisors is an integer number (18084070).

Almost surely, 2^68719447 is an apocalyptic number.

68719447 is a deficient number, since it is larger than the sum of its proper divisors (3616833).

68719447 is a wasteful number, since it uses less digits than its factorization.

68719447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3616832.

The product of its digits is 338688, while the sum is 46.

The square root of 68719447 is about 8289.7193559251. The cubic root of 68719447 is about 409.5999409199.

It can be divided in two parts, 687194 and 47, that added together give a square (687241 = 829²).

The spelling of 68719447 in words is "sixty-eight million, seven hundred nineteen thousand, four hundred forty-seven".