209702 has 4 divisors (see below), whose sum is σ = 314556. Its totient is φ = 104850.

The previous prime is 209701. The next prime is 209707. The reversal of 209702 is 207902.

209702 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 207902 = 2 ⋅103951.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (209701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52424 + ... + 52427.

It is an arithmetic number, because the mean of its divisors is an integer number (78639).

2²⁰⁹⁷⁰² is an apocalyptic number.

209702 is a deficient number, since it is larger than the sum of its proper divisors (104854).

209702 is a wasteful number, since it uses less digits than its factorization.

209702 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104853.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 209702 is about 457.9323094083. The cubic root of 209702 is about 59.4110905237.

The spelling of 209702 in words is "two hundred nine thousand, seven hundred two".