67563947 has 4 divisors (see below), whose sum is σ = 73706136. Its totient is φ = 61421760.

The previous prime is 67563919. The next prime is 67563953. The reversal of 67563947 is 74936576.

It is a happy number.

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 67563947 - 2¹⁸ = 67301803 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67563547) 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, 3071078 + ... + 3071099.

It is an arithmetic number, because the mean of its divisors is an integer number (18426534).

Almost surely, 2^67563947 is an apocalyptic number.

67563947 is a deficient number, since it is larger than the sum of its proper divisors (6142189).

67563947 is a wasteful number, since it uses less digits than its factorization.

67563947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6142188.

The product of its digits is 952560, while the sum is 47.

The square root of 67563947 is about 8219.7291317902. The cubic root of 67563947 is about 407.2911788434.

The spelling of 67563947 in words is "sixty-seven million, five hundred sixty-three thousand, nine hundred forty-seven".