135468409 has 2 divisors, whose sum is σ = 135468410. Its totient is φ = 135468408.

The previous prime is 135468383. The next prime is 135468479. The reversal of 135468409 is 904864531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 129960000 + 5508409 = 11400^2 + 2347^2 .

It is a cyclic number.

It is not a de Polignac number, because 135468409 - 2⁹ = 135467897 is a prime.

It is not a weakly prime, because it can be changed into another prime (135468479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67734204 + 67734205.

It is an arithmetic number, because the mean of its divisors is an integer number (67734205).

Almost surely, 2^135468409 is an apocalyptic number.

It is an amenable number.

135468409 is a deficient number, since it is larger than the sum of its proper divisors (1).

135468409 is an equidigital number, since it uses as much as digits as its factorization.

135468409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 135468409 is about 11639.0896980821. The cubic root of 135468409 is about 513.5854088421.

The spelling of 135468409 in words is "one hundred thirty-five million, four hundred sixty-eight thousand, four hundred nine".