29320891 has 4 divisors (see below), whose sum is σ = 29590000. Its totient is φ = 29051784.

The previous prime is 29320867. The next prime is 29320897. The reversal of 29320891 is 19802392.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 29320891 - 2²¹ = 27223739 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29320897) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 134391 + ... + 134608.

It is an arithmetic number, because the mean of its divisors is an integer number (7397500).

Almost surely, 2^29320891 is an apocalyptic number.

29320891 is a deficient number, since it is larger than the sum of its proper divisors (269109).

29320891 is a wasteful number, since it uses less digits than its factorization.

29320891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 269108.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 29320891 is about 5414.8768222370. The cubic root of 29320891 is about 308.3607224432.

The spelling of 29320891 in words is "twenty-nine million, three hundred twenty thousand, eight hundred ninety-one".