203842117 has 2 divisors, whose sum is σ = 203842118. Its totient is φ = 203842116.

The previous prime is 203842097. The next prime is 203842159. The reversal of 203842117 is 711248302.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136749636 + 67092481 = 11694^2 + 8191^2 .

It is a cyclic number.

It is not a de Polignac number, because 203842117 - 2¹⁵ = 203809349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203849117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101921058 + 101921059.

It is an arithmetic number, because the mean of its divisors is an integer number (101921059).

Almost surely, 2^203842117 is an apocalyptic number.

It is an amenable number.

203842117 is a deficient number, since it is larger than the sum of its proper divisors (1).

203842117 is an equidigital number, since it uses as much as digits as its factorization.

203842117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 203842117 is about 14277.3287767705. The cubic root of 203842117 is about 588.5246264527.

The spelling of 203842117 in words is "two hundred three million, eight hundred forty-two thousand, one hundred seventeen".