29144809 has 4 divisors (see below), whose sum is σ = 29855700. Its totient is φ = 28433920.

The previous prime is 29144807. The next prime is 29144833. The reversal of 29144809 is 90844192.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 6487209 + 22657600 = 2547^2 + 4760^2 .

It is a cyclic number.

It is not a de Polignac number, because 29144809 - 2¹ = 29144807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29144807) 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, 355384 + ... + 355465.

It is an arithmetic number, because the mean of its divisors is an integer number (7463925).

Almost surely, 2^29144809 is an apocalyptic number.

It is an amenable number.

29144809 is a deficient number, since it is larger than the sum of its proper divisors (710891).

29144809 is an equidigital number, since it uses as much as digits as its factorization.

29144809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710890.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 29144809 is about 5398.5932426883. The cubic root of 29144809 is about 307.7422120547.

The spelling of 29144809 in words is "twenty-nine million, one hundred forty-four thousand, eight hundred nine".