68730447 has 4 divisors (see below), whose sum is σ = 91640600. Its totient is φ = 45820296.

The previous prime is 68730437. The next prime is 68730461. The reversal of 68730447 is 74403786.

It is a happy number.

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

It is not a de Polignac number, because 68730447 - 2¹² = 68726351 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 (68730407) 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, 11455072 + ... + 11455077.

It is an arithmetic number, because the mean of its divisors is an integer number (22910150).

Almost surely, 2^68730447 is an apocalyptic number.

68730447 is a deficient number, since it is larger than the sum of its proper divisors (22910153).

68730447 is a wasteful number, since it uses less digits than its factorization.

68730447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22910152.

The product of its (nonzero) digits is 112896, while the sum is 39.

The square root of 68730447 is about 8290.3828017770. The cubic root of 68730447 is about 409.6217947966.

The spelling of 68730447 in words is "sixty-eight million, seven hundred thirty thousand, four hundred forty-seven".