67689939 has 8 divisors (see below), whose sum is σ = 90329040. Its totient is φ = 45088736.

The previous prime is 67689901. The next prime is 67689949. The reversal of 67689939 is 93998676.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 67689939 - 2¹² = 67685843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (67689949) 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 7 ways as a sum of consecutive naturals, for example, 5004 + ... + 12665.

It is an arithmetic number, because the mean of its divisors is an integer number (11291130).

Almost surely, 2^67689939 is an apocalyptic number.

67689939 is a deficient number, since it is larger than the sum of its proper divisors (22639101).

67689939 is a wasteful number, since it uses less digits than its factorization.

67689939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18949.

The product of its digits is 4408992, while the sum is 57.

The square root of 67689939 is about 8227.3895617018. The cubic root of 67689939 is about 407.5441913258.

The spelling of 67689939 in words is "sixty-seven million, six hundred eighty-nine thousand, nine hundred thirty-nine".