203320981 has 2 divisors, whose sum is σ = 203320982. Its totient is φ = 203320980.

The previous prime is 203320973. The next prime is 203321011. The reversal of 203320981 is 189023302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 111640356 + 91680625 = 10566^2 + 9575^2 .

It is a cyclic number.

It is not a de Polignac number, because 203320981 - 2³ = 203320973 is a prime.

It is a super-2 number, since 2×203320981² = 82678842629604722, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203320921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101660490 + 101660491.

It is an arithmetic number, because the mean of its divisors is an integer number (101660491).

Almost surely, 2^203320981 is an apocalyptic number.

It is an amenable number.

203320981 is a deficient number, since it is larger than the sum of its proper divisors (1).

203320981 is an equidigital number, since it uses as much as digits as its factorization.

203320981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2592, while the sum is 28.

The square root of 203320981 is about 14259.0666244323. The cubic root of 203320981 is about 588.0226642582.

The spelling of 203320981 in words is "two hundred three million, three hundred twenty thousand, nine hundred eighty-one".