67968509 has 8 divisors (see below), whose sum is σ = 79485120. Its totient is φ = 56903616.

The previous prime is 67968503. The next prime is 67968517. The reversal of 67968509 is 90586976.

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

It is not a de Polignac number, because 67968509 - 2¹⁶ = 67902973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67968503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 112604 + ... + 113205.

It is an arithmetic number, because the mean of its divisors is an integer number (9935640).

Almost surely, 2^67968509 is an apocalyptic number.

It is an amenable number.

67968509 is a deficient number, since it is larger than the sum of its proper divisors (11516611).

67968509 is a wasteful number, since it uses less digits than its factorization.

67968509 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225859.

The product of its (nonzero) digits is 816480, while the sum is 50.

The square root of 67968509 is about 8244.3016077773. The cubic root of 67968509 is about 408.1024929135.

The spelling of 67968509 in words is "sixty-seven million, nine hundred sixty-eight thousand, five hundred nine".