67673987 has 4 divisors (see below), whose sum is σ = 68331120. Its totient is φ = 67016856.

The previous prime is 67673971. The next prime is 67673989. The reversal of 67673987 is 78937676.

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 67673987 - 2⁴ = 67673971 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (67673989) 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 3 ways as a sum of consecutive naturals, for example, 328412 + ... + 328617.

It is an arithmetic number, because the mean of its divisors is an integer number (17082780).

Almost surely, 2^67673987 is an apocalyptic number.

67673987 is a deficient number, since it is larger than the sum of its proper divisors (657133).

67673987 is a wasteful number, since it uses less digits than its factorization.

67673987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657132.

The product of its digits is 2667168, while the sum is 53.

The square root of 67673987 is about 8226.4200597830. The cubic root of 67673987 is about 407.5121744766.

The spelling of 67673987 in words is "sixty-seven million, six hundred seventy-three thousand, nine hundred eighty-seven".