29918909 has 2 divisors, whose sum is σ = 29918910. Its totient is φ = 29918908.

The previous prime is 29918899. The next prime is 29918921. The reversal of 29918909 is 90981992.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22372900 + 7546009 = 4730^2 + 2747^2 .

It is a cyclic number.

It is not a de Polignac number, because 29918909 - 2¹² = 29914813 is a prime.

It is a super-2 number, since 2×29918909² = 1790282231500562, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (29918969) 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 as a sum of consecutive naturals, namely, 14959454 + 14959455.

It is an arithmetic number, because the mean of its divisors is an integer number (14959455).

Almost surely, 2^29918909 is an apocalyptic number.

It is an amenable number.

29918909 is a deficient number, since it is larger than the sum of its proper divisors (1).

29918909 is an equidigital number, since it uses as much as digits as its factorization.

29918909 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 104976, while the sum is 47.

The square root of 29918909 is about 5469.8180042850. The cubic root of 29918909 is about 310.4430328630.

The spelling of 29918909 in words is "twenty-nine million, nine hundred eighteen thousand, nine hundred nine".