67730013 has 40 divisors (see below), whose sum is σ = 110015136. Its totient is φ = 41277600.

The previous prime is 67730011. The next prime is 67730021. The reversal of 67730013 is 31003776.

It is not a de Polignac number, because 67730013 - 2¹ = 67730011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67730011) 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 39 ways as a sum of consecutive naturals, for example, 137698 + ... + 138188.

Almost surely, 2^67730013 is an apocalyptic number.

It is an amenable number.

67730013 is a deficient number, since it is larger than the sum of its proper divisors (42285123).

67730013 is a wasteful number, since it uses less digits than its factorization.

67730013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647 (or 638 counting only the distinct ones).

The product of its (nonzero) digits is 2646, while the sum is 27.

The square root of 67730013 is about 8229.8246032343. The cubic root of 67730013 is about 407.6246006366.

Adding to 67730013 its reverse (31003776), we get a palindrome (98733789).

The spelling of 67730013 in words is "sixty-seven million, seven hundred thirty thousand, thirteen".