135132409 has 2 divisors, whose sum is σ = 135132410. Its totient is φ = 135132408.

The previous prime is 135132397. The next prime is 135132449. The reversal of 135132409 is 904231531.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119355625 + 15776784 = 10925^2 + 3972^2 .

It is a cyclic number.

It is not a de Polignac number, because 135132409 - 2⁵ = 135132377 is a prime.

It is a Chen prime.

It is equal to p_7652611 and since 135132409 and 7652611 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (135132449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67566204 + 67566205.

It is an arithmetic number, because the mean of its divisors is an integer number (67566205).

Almost surely, 2^135132409 is an apocalyptic number.

It is an amenable number.

135132409 is a deficient number, since it is larger than the sum of its proper divisors (1).

135132409 is an equidigital number, since it uses as much as digits as its factorization.

135132409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 135132409 is about 11624.6466182848. The cubic root of 135132409 is about 513.1604449081.

The spelling of 135132409 in words is "one hundred thirty-five million, one hundred thirty-two thousand, four hundred nine".