29112809 has 4 divisors (see below), whose sum is σ = 31759440. Its totient is φ = 26466180.

The previous prime is 29112791. The next prime is 29112817. The reversal of 29112809 is 90821192.

It is a happy number.

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-29112809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (29112859) 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, 1323299 + ... + 1323320.

It is an arithmetic number, because the mean of its divisors is an integer number (7939860).

Almost surely, 2^29112809 is an apocalyptic number.

It is an amenable number.

29112809 is a deficient number, since it is larger than the sum of its proper divisors (2646631).

29112809 is a wasteful number, since it uses less digits than its factorization.

29112809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2646630.

The product of its (nonzero) digits is 2592, while the sum is 32.

The square root of 29112809 is about 5395.6286936742. The cubic root of 29112809 is about 307.6295406792.

The spelling of 29112809 in words is "twenty-nine million, one hundred twelve thousand, eight hundred nine".