209701 has 2 divisors, whose sum is σ = 209702. Its totient is φ = 209700.

The previous prime is 209687. The next prime is 209707. The reversal of 209701 is 107902.

209701 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 201601 + 8100 = 449^2 + 90^2 .

It is a cyclic number.

It is not a de Polignac number, because 209701 - 2⁵ = 209669 is a prime.

209701 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (209707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 104850 + 104851.

It is an arithmetic number, because the mean of its divisors is an integer number (104851).

2²⁰⁹⁷⁰¹ is an apocalyptic number.

It is an amenable number.

209701 is a deficient number, since it is larger than the sum of its proper divisors (1).

209701 is an equidigital number, since it uses as much as digits as its factorization.

209701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 209701 is about 457.9312175425. The cubic root of 209701 is about 59.4109960862.

The spelling of 209701 in words is "two hundred nine thousand, seven hundred one".