29491109 has 4 divisors (see below), whose sum is σ = 30288204. Its totient is φ = 28694016.

The previous prime is 29491069. The next prime is 29491139. The reversal of 29491109 is 90119492.

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

It can be written as a sum of positive squares in 2 ways, for example, as 25300900 + 4190209 = 5030^2 + 2047^2 .

It is a cyclic number.

It is not a de Polignac number, because 29491109 - 2¹² = 29487013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29491139) 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, 398492 + ... + 398565.

It is an arithmetic number, because the mean of its divisors is an integer number (7572051).

Almost surely, 2^29491109 is an apocalyptic number.

It is an amenable number.

29491109 is a deficient number, since it is larger than the sum of its proper divisors (797095).

29491109 is an equidigital number, since it uses as much as digits as its factorization.

29491109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797094.

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

The square root of 29491109 is about 5430.5717010274. The cubic root of 29491109 is about 308.9562852945.

The spelling of 29491109 in words is "twenty-nine million, four hundred ninety-one thousand, one hundred nine".