210299993 has 2 divisors, whose sum is σ = 210299994. Its totient is φ = 210299992.

The previous prime is 210299989. The next prime is 210300007. The reversal of 210299993 is 399992012.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161467849 + 48832144 = 12707^2 + 6988^2 .

It is a cyclic number.

It is not a de Polignac number, because 210299993 - 2² = 210299989 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (210299953) 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, 105149996 + 105149997.

It is an arithmetic number, because the mean of its divisors is an integer number (105149997).

Almost surely, 2^210299993 is an apocalyptic number.

It is an amenable number.

210299993 is a deficient number, since it is larger than the sum of its proper divisors (1).

210299993 is an equidigital number, since it uses as much as digits as its factorization.

210299993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 210299993 is about 14501.7237940874. The cubic root of 210299993 is about 594.6750979048.

The spelling of 210299993 in words is "two hundred ten million, two hundred ninety-nine thousand, nine hundred ninety-three".