29135209 has 4 divisors (see below), whose sum is σ = 29812816. Its totient is φ = 28457604.

The previous prime is 29135207. The next prime is 29135219. The reversal of 29135209 is 90253192.

29135209 is nontrivially palindromic in base 7.

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 not a de Polignac number, because 29135209 - 2¹ = 29135207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29135207) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338739 + ... + 338824.

It is an arithmetic number, because the mean of its divisors is an integer number (7453204).

Almost surely, 2^29135209 is an apocalyptic number.

It is an amenable number.

29135209 is a deficient number, since it is larger than the sum of its proper divisors (677607).

29135209 is an equidigital number, since it uses as much as digits as its factorization.

29135209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 677606.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 29135209 is about 5397.7040489453. The cubic root of 29135209 is about 307.7084193054.

The spelling of 29135209 in words is "twenty-nine million, one hundred thirty-five thousand, two hundred nine".