67243989 has 8 divisors (see below), whose sum is σ = 90583360. Its totient is φ = 44366976.

The previous prime is 67243987. The next prime is 67243997. The reversal of 67243989 is 98934276.

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

It is not a de Polignac number, because 67243989 - 2¹ = 67243987 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 (67243987) 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 7 ways as a sum of consecutive naturals, for example, 115249 + ... + 115830.

It is an arithmetic number, because the mean of its divisors is an integer number (11322920).

Almost surely, 2^67243989 is an apocalyptic number.

It is an amenable number.

67243989 is a deficient number, since it is larger than the sum of its proper divisors (23339371).

67243989 is a wasteful number, since it uses less digits than its factorization.

67243989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231179.

The product of its digits is 653184, while the sum is 48.

The square root of 67243989 is about 8200.2432281000. The cubic root of 67243989 is about 406.6472342084.

The spelling of 67243989 in words is "sixty-seven million, two hundred forty-three thousand, nine hundred eighty-nine".