202897989 has 12 divisors (see below), whose sum is σ = 334942816. Its totient is φ = 115941672.

The previous prime is 202897967. The next prime is 202897997. The reversal of 202897989 is 989798202.

It is not a de Polignac number, because 202897989 - 2⁹ = 202897477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202895989) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1610239 + ... + 1610364.

Almost surely, 2^202897989 is an apocalyptic number.

It is an amenable number.

202897989 is a deficient number, since it is larger than the sum of its proper divisors (132044827).

202897989 is a wasteful number, since it uses less digits than its factorization.

202897989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220616 (or 3220613 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 54.

The square root of 202897989 is about 14244.2265146269. The cubic root of 202897989 is about 587.6146041101.

The spelling of 202897989 in words is "two hundred two million, eight hundred ninety-seven thousand, nine hundred eighty-nine".