29999 has 4 divisors (see below), whose sum is σ = 30360.
Its totient is φ = 29640.
The previous prime is 29989. The next prime is 30011. The reversal of 29999 is 99992.
It can be divided in two parts, 2 and 9999, that added together give a palindrome (10001).
It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.
It is a cyclic number.
It is not a de Polignac number, because 29999 - 24 = 29983 is a prime.
It is a Duffinian number.
29999 is a modest number, since divided by 999 gives 29 as remainder.
It is a plaindrome in base 10.
It is a congruent number.
It is not an unprimeable number, because it can be changed into a prime (29959) by changing a digit.
It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17 + ... + 245.
It is an arithmetic number, because the mean of its divisors is an integer number (7590).
229999 is an apocalyptic number.
29999 is a deficient number, since it is larger than the sum of its proper divisors (361).
29999 is a wasteful number, since it uses less digits than its factorization.
29999 is an evil number, because the sum of its binary digits is even.
The sum of its prime factors is 360.
The product of its digits is 13122, while the sum is 38.
The square root of 29999 is about 173.2021939815.
The cubic root of 29999 is about 31.0719798076.
The spelling of 29999 in words is "twenty-nine thousand, nine hundred ninety-nine".