87969 has 16 divisors (see below), whose sum is σ = 138240. Its totient is φ = 48720.

The previous prime is 87961. The next prime is 87973. The reversal of 87969 is 96978.

It is not a de Polignac number, because 87969 - 2³ = 87961 is a prime.

It is a super-2 number, since 2×87969² = 15477089922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (87961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1204 + ... + 1274.

It is an arithmetic number, because the mean of its divisors is an integer number (8640).

2⁸⁷⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

87969 is a deficient number, since it is larger than the sum of its proper divisors (50271).

87969 is a wasteful number, since it uses less digits than its factorization.

87969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140.

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

The square root of 87969 is about 296.5956843921. The cubic root of 87969 is about 44.4743782144.

Subtracting 87969 from its reverse (96978), we obtain a palindrome (9009).

The spelling of 87969 in words is "eighty-seven thousand, nine hundred sixty-nine".