67444013 has 24 divisors (see below), whose sum is σ = 85310208. Its totient is φ = 52183872.

The previous prime is 67443973. The next prime is 67444067. The reversal of 67444013 is 31044476.

It is not a de Polignac number, because 67444013 - 2⁸ = 67443757 is a prime.

It is a hoax number, since the sum of its digits (29) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67447013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 54995 + ... + 56207.

It is an arithmetic number, because the mean of its divisors is an integer number (3554592).

Almost surely, 2^67444013 is an apocalyptic number.

It is an amenable number.

67444013 is a deficient number, since it is larger than the sum of its proper divisors (17866195).

67444013 is a wasteful number, since it uses less digits than its factorization.

67444013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1293 (or 1280 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 67444013 is about 8212.4303954432. The cubic root of 67444013 is about 407.0500394259.

Adding to 67444013 its reverse (31044476), we get a palindrome (98488489).

The spelling of 67444013 in words is "sixty-seven million, four hundred forty-four thousand, thirteen".