67712109 has 12 divisors (see below), whose sum is σ = 92794464. Its totient is φ = 43918704.

The previous prime is 67712093. The next prime is 67712119. The reversal of 67712109 is 90121776.

It is not a de Polignac number, because 67712109 - 2⁴ = 67712093 is a prime.

It is a super-3 number, since 3×67712109³ (a number of 24 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 67712109.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67712119) 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 11 ways as a sum of consecutive naturals, for example, 4137 + ... + 12350.

It is an arithmetic number, because the mean of its divisors is an integer number (7732872).

Almost surely, 2^67712109 is an apocalyptic number.

It is an amenable number.

67712109 is a deficient number, since it is larger than the sum of its proper divisors (25082355).

67712109 is a wasteful number, since it uses less digits than its factorization.

67712109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16564 (or 16527 counting only the distinct ones).

The product of its (nonzero) digits is 5292, while the sum is 33.

The square root of 67712109 is about 8228.7367803327. The cubic root of 67712109 is about 407.5886798107.

The spelling of 67712109 in words is "sixty-seven million, seven hundred twelve thousand, one hundred nine".