29139 has 8 divisors (see below), whose sum is σ = 42432. Its totient is φ = 17640.

The previous prime is 29137. The next prime is 29147. The reversal of 29139 is 93192.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 29139 - 2¹ = 29137 is a prime.

It is a Smith number, since the sum of its digits (24) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (29131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 409 + ... + 474.

It is an arithmetic number, because the mean of its divisors is an integer number (5304).

2²⁹¹³⁹ is an apocalyptic number.

29139 is a deficient number, since it is larger than the sum of its proper divisors (13293).

29139 is a wasteful number, since it uses less digits than its factorization.

29139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 897.

The product of its digits is 486, while the sum is 24.

The square root of 29139 is about 170.7014938423. The cubic root of 29139 is about 30.7721764808.

The spelling of 29139 in words is "twenty-nine thousand, one hundred thirty-nine".