29989 has 2 divisors, whose sum is σ = 29990.
Its totient is φ = 29988.
The previous prime is 29983. The next prime is 30011. The reversal of 29989 is 98992.
It is a weak prime.
It can be written as a sum of positive squares in only one way, i.e., 28900 + 1089 = 170^2 + 33^2
It is a cyclic number.
It is not a de Polignac number, because 29989 - 211 = 27941 is a prime.
29989 is a lucky number.
It is a congruent number.
It is not a weakly prime, because it can be changed into another prime (29983) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14994 + 14995.
It is an arithmetic number, because the mean of its divisors is an integer number (14995).
229989 is an apocalyptic number.
It is an amenable number.
29989 is a deficient number, since it is larger than the sum of its proper divisors (1).
29989 is an equidigital number, since it uses as much as digits as its factorization.
29989 is an evil number, because the sum of its binary digits is even.
The product of its digits is 11664, while the sum is 37.
The square root of 29989 is about 173.1733235807.
The cubic root of 29989 is about 31.0685268667.
The spelling of 29989 in words is "twenty-nine thousand, nine hundred eighty-nine".