29389921 has 8 divisors (see below), whose sum is σ = 32202144. Its totient is φ = 26601120.

The previous prime is 29389901. The next prime is 29389937. The reversal of 29389921 is 12998392.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 29389921 - 2⁷ = 29389793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29389901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3171 + ... + 8296.

It is an arithmetic number, because the mean of its divisors is an integer number (4025268).

Almost surely, 2^29389921 is an apocalyptic number.

It is an amenable number.

29389921 is a deficient number, since it is larger than the sum of its proper divisors (2812223).

29389921 is a wasteful number, since it uses less digits than its factorization.

29389921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11711.

The product of its digits is 69984, while the sum is 43.

The square root of 29389921 is about 5421.2471812305. The cubic root of 29389921 is about 308.6025233929.

The spelling of 29389921 in words is "twenty-nine million, three hundred eighty-nine thousand, nine hundred twenty-one".