131105189 has 2 divisors, whose sum is σ = 131105190. Its totient is φ = 131105188.

The previous prime is 131105179. The next prime is 131105197. The reversal of 131105189 is 981501131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130530625 + 574564 = 11425^2 + 758^2 .

It is a cyclic number.

It is not a de Polignac number, because 131105189 - 2⁸ = 131104933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (131105119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65552594 + 65552595.

It is an arithmetic number, because the mean of its divisors is an integer number (65552595).

Almost surely, 2^131105189 is an apocalyptic number.

It is an amenable number.

131105189 is a deficient number, since it is larger than the sum of its proper divisors (1).

131105189 is an equidigital number, since it uses as much as digits as its factorization.

131105189 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1080, while the sum is 29.

The square root of 131105189 is about 11450.1174229787. The cubic root of 131105189 is about 508.0112075668.

The spelling of 131105189 in words is "one hundred thirty-one million, one hundred five thousand, one hundred eighty-nine".