202108009 has 2 divisors, whose sum is σ = 202108010. Its totient is φ = 202108008.

The previous prime is 202107977. The next prime is 202108031. The reversal of 202108009 is 900801202.

202108009 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (202108031) can be obtained adding 202108009 to its sum of digits (22).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 179640409 + 22467600 = 13403^2 + 4740^2 .

It is a cyclic number.

It is not a de Polignac number, because 202108009 - 2⁵ = 202107977 is a prime.

It is not a weakly prime, because it can be changed into another prime (202108069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101054004 + 101054005.

It is an arithmetic number, because the mean of its divisors is an integer number (101054005).

Almost surely, 2^202108009 is an apocalyptic number.

It is an amenable number.

202108009 is a deficient number, since it is larger than the sum of its proper divisors (1).

202108009 is an equidigital number, since it uses as much as digits as its factorization.

202108009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

The square root of 202108009 is about 14216.4696391193. The cubic root of 202108009 is about 586.8509895956.

The spelling of 202108009 in words is "two hundred two million, one hundred eight thousand, nine".