210509008873 has 2 divisors, whose sum is σ = 210509008874. Its totient is φ = 210509008872.

The previous prime is 210509008867. The next prime is 210509008903. The reversal of 210509008873 is 378800905012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 133607063529 + 76901945344 = 365523^2 + 277312^2 .

It is a cyclic number.

It is not a de Polignac number, because 210509008873 - 2¹⁷ = 210508877801 is a prime.

It is not a weakly prime, because it can be changed into another prime (210509018873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105254504436 + 105254504437.

It is an arithmetic number, because the mean of its divisors is an integer number (105254504437).

Almost surely, 2^210509008873 is an apocalyptic number.

It is an amenable number.

210509008873 is a deficient number, since it is larger than the sum of its proper divisors (1).

210509008873 is an equidigital number, since it uses as much as digits as its factorization.

210509008873 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 120960, while the sum is 43.

The spelling of 210509008873 in words is "two hundred ten billion, five hundred nine million, eight thousand, eight hundred seventy-three".