203607161 has 2 divisors, whose sum is σ = 203607162. Its totient is φ = 203607160.

The previous prime is 203607137. The next prime is 203607167. The reversal of 203607161 is 161706302.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 167547136 + 36060025 = 12944^2 + 6005^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-203607161 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 203607161.

It is not a weakly prime, because it can be changed into another prime (203607167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 101803580 + 101803581.

It is an arithmetic number, because the mean of its divisors is an integer number (101803581).

Almost surely, 2^203607161 is an apocalyptic number.

It is an amenable number.

203607161 is a deficient number, since it is larger than the sum of its proper divisors (1).

203607161 is an equidigital number, since it uses as much as digits as its factorization.

203607161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The square root of 203607161 is about 14269.0981144570. The cubic root of 203607161 is about 588.2984210670.

The spelling of 203607161 in words is "two hundred three million, six hundred seven thousand, one hundred sixty-one".