210900013 has 2 divisors, whose sum is σ = 210900014. Its totient is φ = 210900012.

The previous prime is 210899999. The next prime is 210900071. The reversal of 210900013 is 310009012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 179506404 + 31393609 = 13398^2 + 5603^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-210900013 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 210900013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (210900413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105450006 + 105450007.

It is an arithmetic number, because the mean of its divisors is an integer number (105450007).

Almost surely, 2^210900013 is an apocalyptic number.

It is an amenable number.

210900013 is a deficient number, since it is larger than the sum of its proper divisors (1).

210900013 is an equidigital number, since it uses as much as digits as its factorization.

210900013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 210900013 is about 14522.3969440310. The cubic root of 210900013 is about 595.2401290488.

Adding to 210900013 its reverse (310009012), we get a palindrome (520909025).

The spelling of 210900013 in words is "two hundred ten million, nine hundred thousand, thirteen".