202491189 has 24 divisors (see below), whose sum is σ = 309285600. Its totient is φ = 127306080.

The previous prime is 202491143. The next prime is 202491197. The reversal of 202491189 is 981194202.

It is not a de Polignac number, because 202491189 - 2⁷ = 202491061 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202491389) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36574 + ... + 41744.

It is an arithmetic number, because the mean of its divisors is an integer number (12886900).

Almost surely, 2^202491189 is an apocalyptic number.

It is an amenable number.

202491189 is a deficient number, since it is larger than the sum of its proper divisors (106794411).

202491189 is a wasteful number, since it uses less digits than its factorization.

202491189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5425 (or 5422 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 36.

The square root of 202491189 is about 14229.9398804071. The cubic root of 202491189 is about 587.2216290398.

The spelling of 202491189 in words is "two hundred two million, four hundred ninety-one thousand, one hundred eighty-nine".