29081009 has 4 divisors (see below), whose sum is σ = 29092980. Its totient is φ = 29069040.

The previous prime is 29080991. The next prime is 29081023. The reversal of 29081009 is 90018092.

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 can be written as a sum of positive squares in 2 ways, for example, as 12271009 + 16810000 = 3503^2 + 4100^2 .

It is a cyclic number.

It is not a de Polignac number, because 29081009 - 2²⁴ = 12303793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29081099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 902 + ... + 7679.

It is an arithmetic number, because the mean of its divisors is an integer number (7273245).

Almost surely, 2^29081009 is an apocalyptic number.

It is an amenable number.

29081009 is a deficient number, since it is larger than the sum of its proper divisors (11971).

29081009 is an equidigital number, since it uses as much as digits as its factorization.

29081009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11970.

The product of its (nonzero) digits is 1296, while the sum is 29.

The square root of 29081009 is about 5392.6810586201. The cubic root of 29081009 is about 307.5174916791.

The spelling of 29081009 in words is "twenty-nine million, eighty-one thousand, nine".