67989487 has 4 divisors (see below), whose sum is σ = 68478760. Its totient is φ = 67500216.

The previous prime is 67989457. The next prime is 67989527. The reversal of 67989487 is 78498976.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 67989487 - 2¹⁵ = 67956719 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 (67989457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 244428 + ... + 244705.

It is an arithmetic number, because the mean of its divisors is an integer number (17119690).

Almost surely, 2^67989487 is an apocalyptic number.

67989487 is a deficient number, since it is larger than the sum of its proper divisors (489273).

67989487 is a wasteful number, since it uses less digits than its factorization.

67989487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489272.

The product of its digits is 6096384, while the sum is 58.

The square root of 67989487 is about 8245.5737823392. The cubic root of 67989487 is about 408.1444745782.

The spelling of 67989487 in words is "sixty-seven million, nine hundred eighty-nine thousand, four hundred eighty-seven".