203011320989 has 2 divisors, whose sum is σ = 203011320990. Its totient is φ = 203011320988.

The previous prime is 203011320971. The next prime is 203011321033. The reversal of 203011320989 is 989023110302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177795468964 + 25215852025 = 421658^2 + 158795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203011320989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203011320949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101505660494 + 101505660495.

It is an arithmetic number, because the mean of its divisors is an integer number (101505660495).

Almost surely, 2^203011320989 is an apocalyptic number.

It is an amenable number.

203011320989 is a deficient number, since it is larger than the sum of its proper divisors (1).

203011320989 is an equidigital number, since it uses as much as digits as its factorization.

203011320989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328, while the sum is 38.

The spelling of 203011320989 in words is "two hundred three billion, eleven million, three hundred twenty thousand, nine hundred eighty-nine".