203011208989 has 2 divisors, whose sum is σ = 203011208990. Its totient is φ = 203011208988.

The previous prime is 203011208963. The next prime is 203011209017. The reversal of 203011208989 is 989802110302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199800060100 + 3211148889 = 446990^2 + 56667^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203011208989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203011208089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101505604494 + 101505604495.

It is an arithmetic number, because the mean of its divisors is an integer number (101505604495).

Almost surely, 2^203011208989 is an apocalyptic number.

It is an amenable number.

203011208989 is a deficient number, since it is larger than the sum of its proper divisors (1).

203011208989 is an equidigital number, since it uses as much as digits as its factorization.

203011208989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62208, while the sum is 43.

The spelling of 203011208989 in words is "two hundred three billion, eleven million, two hundred eight thousand, nine hundred eighty-nine".