29945809 has 2 divisors, whose sum is σ = 29945810. Its totient is φ = 29945808.

The previous prime is 29945779. The next prime is 29945813. The reversal of 29945809 is 90854992.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29942784 + 3025 = 5472^2 + 55^2 .

It is a cyclic number.

It is not a de Polignac number, because 29945809 - 2⁹ = 29945297 is a prime.

It is not a weakly prime, because it can be changed into another prime (29945849) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14972904 + 14972905.

It is an arithmetic number, because the mean of its divisors is an integer number (14972905).

Almost surely, 2^29945809 is an apocalyptic number.

It is an amenable number.

29945809 is a deficient number, since it is larger than the sum of its proper divisors (1).

29945809 is an equidigital number, since it uses as much as digits as its factorization.

29945809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 29945809 is about 5472.2764001830. The cubic root of 29945809 is about 310.5360444550.

The spelling of 29945809 in words is "twenty-nine million, nine hundred forty-five thousand, eight hundred nine".