134128549 has 2 divisors, whose sum is σ = 134128550. Its totient is φ = 134128548.

The previous prime is 134128541. The next prime is 134128601. The reversal of 134128549 is 945821431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102880449 + 31248100 = 10143^2 + 5590^2 .

It is an emirp because it is prime and its reverse (945821431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 134128549 - 2³ = 134128541 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (134128541) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67064274 + 67064275.

It is an arithmetic number, because the mean of its divisors is an integer number (67064275).

Almost surely, 2^134128549 is an apocalyptic number.

It is an amenable number.

134128549 is a deficient number, since it is larger than the sum of its proper divisors (1).

134128549 is an equidigital number, since it uses as much as digits as its factorization.

134128549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 37.

The square root of 134128549 is about 11581.3880428902. The cubic root of 134128549 is about 511.8865779133.

It can be divided in two parts, 1341 and 28549, that added together give a triangular number (29890 = T₂₄₄).

The spelling of 134128549 in words is "one hundred thirty-four million, one hundred twenty-eight thousand, five hundred forty-nine".