29129009 has 12 divisors (see below), whose sum is σ = 36049536. Its totient is φ = 23046192.

The previous prime is 29128999. The next prime is 29129039. The reversal of 29129009 is 90092192.

29129009 = 181² + 182² + ... + 453².

It is a de Polignac number, because none of the positive numbers 2^k-29129009 is a prime.

It is a Smith number, since the sum of its digits (32) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

29129009 is a modest number, since divided by 9009 gives 2912 as remainder.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29129039) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11129 + ... + 13494.

It is an arithmetic number, because the mean of its divisors is an integer number (3004128).

Almost surely, 2^29129009 is an apocalyptic number.

It is an amenable number.

29129009 is a deficient number, since it is larger than the sum of its proper divisors (6920527).

29129009 is a wasteful number, since it uses less digits than its factorization.

29129009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24656 (or 24643 counting only the distinct ones).

The product of its (nonzero) digits is 2916, while the sum is 32.

The square root of 29129009 is about 5397.1297001277. The cubic root of 29129009 is about 307.6865908762.

The spelling of 29129009 in words is "twenty-nine million, one hundred twenty-nine thousand, nine".