29921129 has 4 divisors (see below), whose sum is σ = 34195584. Its totient is φ = 25646676.

The previous prime is 29921119. The next prime is 29921131. The reversal of 29921129 is 92112992.

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 29921129 - 2¹² = 29917033 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 (29921119) 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, 2137217 + ... + 2137230.

It is an arithmetic number, because the mean of its divisors is an integer number (8548896).

Almost surely, 2^29921129 is an apocalyptic number.

It is an amenable number.

29921129 is a deficient number, since it is larger than the sum of its proper divisors (4274455).

29921129 is an equidigital number, since it uses as much as digits as its factorization.

29921129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4274454.

The product of its digits is 5832, while the sum is 35.

The square root of 29921129 is about 5470.0209323183. The cubic root of 29921129 is about 310.4507110227.

The spelling of 29921129 in words is "twenty-nine million, nine hundred twenty-one thousand, one hundred twenty-nine".