203042117 has 2 divisors, whose sum is σ = 203042118. Its totient is φ = 203042116.

The previous prime is 203042071. The next prime is 203042123. The reversal of 203042117 is 711240302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 197514916 + 5527201 = 14054^2 + 2351^2 .

It is a cyclic number.

It is not a de Polignac number, because 203042117 - 2⁶ = 203042053 is a prime.

It is a super-2 number, since 2×203042117² = 82452202551683378, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (203042317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101521058 + 101521059.

It is an arithmetic number, because the mean of its divisors is an integer number (101521059).

Almost surely, 2^203042117 is an apocalyptic number.

It is an amenable number.

203042117 is a deficient number, since it is larger than the sum of its proper divisors (1).

203042117 is an equidigital number, since it uses as much as digits as its factorization.

203042117 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 203042117 is about 14249.2847890692. The cubic root of 203042117 is about 587.7537079565.

Adding to 203042117 its reverse (711240302), we get a palindrome (914282419).

The spelling of 203042117 in words is "two hundred three million, forty-two thousand, one hundred seventeen".