29905217 has 2 divisors, whose sum is σ = 29905218. Its totient is φ = 29905216.

The previous prime is 29905199. The next prime is 29905219. The reversal of 29905217 is 71250992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21196816 + 8708401 = 4604^2 + 2951^2 .

It is a cyclic number.

It is not a de Polignac number, because 29905217 - 2¹⁶ = 29839681 is a prime.

Together with 29905219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (29905219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14952608 + 14952609.

It is an arithmetic number, because the mean of its divisors is an integer number (14952609).

Almost surely, 2^29905217 is an apocalyptic number.

It is an amenable number.

29905217 is a deficient number, since it is larger than the sum of its proper divisors (1).

29905217 is an equidigital number, since it uses as much as digits as its factorization.

29905217 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 29905217 is about 5468.5662654849. The cubic root of 29905217 is about 310.3956688968.

The spelling of 29905217 in words is "twenty-nine million, nine hundred five thousand, two hundred seventeen".