67989669 has 16 divisors (see below), whose sum is σ = 99084864. Its totient is φ = 41126400.

The previous prime is 67989661. The next prime is 67989703. The reversal of 67989669 is 96698976.

It is a happy number.

It is not a de Polignac number, because 67989669 - 2³ = 67989661 is a prime.

It is a super-2 number, since 2×67989669² = 9245190181459122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67989661) 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 15 ways as a sum of consecutive naturals, for example, 18549 + ... + 21909.

It is an arithmetic number, because the mean of its divisors is an integer number (6192804).

Almost surely, 2^67989669 is an apocalyptic number.

It is an amenable number.

67989669 is a deficient number, since it is larger than the sum of its proper divisors (31095195).

67989669 is a wasteful number, since it uses less digits than its factorization.

67989669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3988.

The product of its digits is 8817984, while the sum is 60.

The square root of 67989669 is about 8245.5848185559. The cubic root of 67989669 is about 408.1448387631.

The spelling of 67989669 in words is "sixty-seven million, nine hundred eighty-nine thousand, six hundred sixty-nine".