89669 has 2 divisors, whose sum is σ = 89670. Its totient is φ = 89668.

The previous prime is 89659. The next prime is 89671. The reversal of 89669 is 96698.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68644 + 21025 = 262^2 + 145^2 .

It is a cyclic number.

It is not a de Polignac number, because 89669 - 2⁴ = 89653 is a prime.

It is a super-2 number, since 2×89669² = 16081059122, which contains 22 as substring.

Together with 89671, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (89659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 44834 + 44835.

It is an arithmetic number, because the mean of its divisors is an integer number (44835).

2⁸⁹⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

89669 is a deficient number, since it is larger than the sum of its proper divisors (1).

89669 is an equidigital number, since it uses as much as digits as its factorization.

89669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 23328, while the sum is 38.

The square root of 89669 is about 299.4478251716. The cubic root of 89669 is about 44.7590412742.

The spelling of 89669 in words is "eighty-nine thousand, six hundred sixty-nine".