210005449 has 2 divisors, whose sum is σ = 210005450. Its totient is φ = 210005448.

The previous prime is 210005429. The next prime is 210005473. The reversal of 210005449 is 944500012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 169911225 + 40094224 = 13035^2 + 6332^2 .

It is a cyclic number.

It is not a de Polignac number, because 210005449 - 2⁵ = 210005417 is a prime.

It is not a weakly prime, because it can be changed into another prime (210005429) 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, 105002724 + 105002725.

It is an arithmetic number, because the mean of its divisors is an integer number (105002725).

Almost surely, 2^210005449 is an apocalyptic number.

It is an amenable number.

210005449 is a deficient number, since it is larger than the sum of its proper divisors (1).

210005449 is an equidigital number, since it uses as much as digits as its factorization.

210005449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 210005449 is about 14491.5647533315. The cubic root of 210005449 is about 594.3973362526.

The spelling of 210005449 in words is "two hundred ten million, five thousand, four hundred forty-nine".