203997163 has 2 divisors, whose sum is σ = 203997164. Its totient is φ = 203997162.

The previous prime is 203997149. The next prime is 203997253. The reversal of 203997163 is 361799302.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203997163 is a prime.

It is a super-2 number, since 2×203997163² = 83229685024097138, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (203997133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101998581 + 101998582.

It is an arithmetic number, because the mean of its divisors is an integer number (101998582).

Almost surely, 2^203997163 is an apocalyptic number.

203997163 is a deficient number, since it is larger than the sum of its proper divisors (1).

203997163 is an equidigital number, since it uses as much as digits as its factorization.

203997163 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 61236, while the sum is 40.

The square root of 203997163 is about 14282.7575418754. The cubic root of 203997163 is about 588.6738027944.

The spelling of 203997163 in words is "two hundred three million, nine hundred ninety-seven thousand, one hundred sixty-three".