134965409 has 2 divisors, whose sum is σ = 134965410. Its totient is φ = 134965408.

The previous prime is 134965373. The next prime is 134965421. The reversal of 134965409 is 904569431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82446400 + 52519009 = 9080^2 + 7247^2 .

It is a cyclic number.

It is not a de Polignac number, because 134965409 - 2¹⁶ = 134899873 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (134965459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67482704 + 67482705.

It is an arithmetic number, because the mean of its divisors is an integer number (67482705).

Almost surely, 2^134965409 is an apocalyptic number.

It is an amenable number.

134965409 is a deficient number, since it is larger than the sum of its proper divisors (1).

134965409 is an equidigital number, since it uses as much as digits as its factorization.

134965409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 116640, while the sum is 41.

The square root of 134965409 is about 11617.4613836242. The cubic root of 134965409 is about 512.9489656099.

The spelling of 134965409 in words is "one hundred thirty-four million, nine hundred sixty-five thousand, four hundred nine".