161104133 has 2 divisors, whose sum is σ = 161104134. Its totient is φ = 161104132.

The previous prime is 161104127. The next prime is 161104271. The reversal of 161104133 is 331401161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 155800324 + 5303809 = 12482^2 + 2303^2 .

It is a cyclic number.

It is not a de Polignac number, because 161104133 - 2²⁰ = 160055557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161104103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80552066 + 80552067.

It is an arithmetic number, because the mean of its divisors is an integer number (80552067).

Almost surely, 2^161104133 is an apocalyptic number.

It is an amenable number.

161104133 is a deficient number, since it is larger than the sum of its proper divisors (1).

161104133 is an equidigital number, since it uses as much as digits as its factorization.

161104133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 20.

The square root of 161104133 is about 12692.6802921999. The cubic root of 161104133 is about 544.1294442631.

Adding to 161104133 its reverse (331401161), we get a palindrome (492505294).

The spelling of 161104133 in words is "one hundred sixty-one million, one hundred four thousand, one hundred thirty-three".