29000921 has 4 divisors (see below), whose sum is σ = 29022672. Its totient is φ = 28979172.

The previous prime is 29000893. The next prime is 29000941. The reversal of 29000921 is 12900092.

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 29000921 - 2¹⁸ = 28738777 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29000941) 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, 8735 + ... + 11588.

It is an arithmetic number, because the mean of its divisors is an integer number (7255668).

Almost surely, 2^29000921 is an apocalyptic number.

It is an amenable number.

29000921 is a deficient number, since it is larger than the sum of its proper divisors (21751).

29000921 is a wasteful number, since it uses less digits than its factorization.

29000921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21750.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 29000921 is about 5385.2503191588. The cubic root of 29000921 is about 307.2349349523.

The spelling of 29000921 in words is "twenty-nine million, nine hundred twenty-one", and thus it is an aban number.