202340209 has 2 divisors, whose sum is σ = 202340210. Its totient is φ = 202340208.

The previous prime is 202340197. The next prime is 202340219. The reversal of 202340209 is 902043202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 138579984 + 63760225 = 11772^2 + 7985^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-202340209 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202340209.

It is not a weakly prime, because it can be changed into another prime (202340219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101170104 + 101170105.

It is an arithmetic number, because the mean of its divisors is an integer number (101170105).

Almost surely, 2^202340209 is an apocalyptic number.

It is an amenable number.

202340209 is a deficient number, since it is larger than the sum of its proper divisors (1).

202340209 is an equidigital number, since it uses as much as digits as its factorization.

202340209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 202340209 is about 14224.6338792955. The cubic root of 202340209 is about 587.0756461188.

The spelling of 202340209 in words is "two hundred two million, three hundred forty thousand, two hundred nine".