89969 has 4 divisors (see below), whose sum is σ = 98160. Its totient is φ = 81780.

The previous prime is 89963. The next prime is 89977. The reversal of 89969 is 96998.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-89969 is a prime.

It is a super-2 number, since 2×89969² = 16188841922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (89963) 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 3 ways as a sum of consecutive naturals, for example, 4079 + ... + 4100.

It is an arithmetic number, because the mean of its divisors is an integer number (24540).

2⁸⁹⁹⁶⁹ is an apocalyptic number.

It is an amenable number.

89969 is a deficient number, since it is larger than the sum of its proper divisors (8191).

89969 is a wasteful number, since it uses less digits than its factorization.

89969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8190.

The product of its digits is 34992, while the sum is 41.

The square root of 89969 is about 299.9483288835. The cubic root of 89969 is about 44.8089015581.

The spelling of 89969 in words is "eighty-nine thousand, nine hundred sixty-nine".