29689 has 4 divisors (see below), whose sum is σ = 32400. Its totient is φ = 26980.

The previous prime is 29683. The next prime is 29717. The reversal of 29689 is 98692.

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-29689 is a prime.

It is a Duffinian number.

29689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (29683) 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, 1339 + ... + 1360.

It is an arithmetic number, because the mean of its divisors is an integer number (8100).

2²⁹⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

29689 is a deficient number, since it is larger than the sum of its proper divisors (2711).

29689 is a wasteful number, since it uses less digits than its factorization.

29689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2710.

The product of its digits is 7776, while the sum is 34.

The square root of 29689 is about 172.3049622036. The cubic root of 29689 is about 30.9645797319.

The spelling of 29689 in words is "twenty-nine thousand, six hundred eighty-nine".