202398109 has 2 divisors, whose sum is σ = 202398110. Its totient is φ = 202398108.

The previous prime is 202398071. The next prime is 202398113. The reversal of 202398109 is 901893202.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190357209 + 12040900 = 13797^2 + 3470^2 .

It is a cyclic number.

It is not a de Polignac number, because 202398109 - 2⁷ = 202397981 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202398139) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101199054 + 101199055.

It is an arithmetic number, because the mean of its divisors is an integer number (101199055).

Almost surely, 2^202398109 is an apocalyptic number.

It is an amenable number.

202398109 is a deficient number, since it is larger than the sum of its proper divisors (1).

202398109 is an equidigital number, since it uses as much as digits as its factorization.

202398109 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 202398109 is about 14226.6689354887. The cubic root of 202398109 is about 587.1316383482.

The spelling of 202398109 in words is "two hundred two million, three hundred ninety-eight thousand, one hundred nine".