202119989 has 2 divisors, whose sum is σ = 202119990. Its totient is φ = 202119988.

The previous prime is 202119943. The next prime is 202120091. The reversal of 202119989 is 989911202.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 200703889 + 1416100 = 14167^2 + 1190^2 .

It is a cyclic number.

It is not a de Polignac number, because 202119989 - 2⁸ = 202119733 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (202119289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101059994 + 101059995.

It is an arithmetic number, because the mean of its divisors is an integer number (101059995).

Almost surely, 2^202119989 is an apocalyptic number.

It is an amenable number.

202119989 is a deficient number, since it is larger than the sum of its proper divisors (1).

202119989 is an equidigital number, since it uses as much as digits as its factorization.

202119989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 41.

The square root of 202119989 is about 14216.8909751746. The cubic root of 202119989 is about 586.8625846102.

The spelling of 202119989 in words is "two hundred two million, one hundred nineteen thousand, nine hundred eighty-nine".