69987 has 8 divisors (see below), whose sum is σ = 95760. Its totient is φ = 45440.

The previous prime is 69959. The next prime is 69991. The reversal of 69987 is 78996.

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

It is a cyclic number.

It is not a de Polignac number, because 69987 - 2⁷ = 69859 is a prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 69987.

It is not an unprimeable number, because it can be changed into a prime (69997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 162 + ... + 407.

It is an arithmetic number, because the mean of its divisors is an integer number (11970).

2⁶⁹⁹⁸⁷ is an apocalyptic number.

69987 is a deficient number, since it is larger than the sum of its proper divisors (25773).

69987 is a wasteful number, since it uses less digits than its factorization.

69987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613.

The product of its digits is 27216, while the sum is 39.

The square root of 69987 is about 264.5505622750. The cubic root of 69987 is about 41.2103015683.

Subtracting 69987 from its reverse (78996), we obtain a palindrome (9009).

The spelling of 69987 in words is "sixty-nine thousand, nine hundred eighty-seven".