135234409 has 2 divisors, whose sum is σ = 135234410. Its totient is φ = 135234408.

The previous prime is 135234373. The next prime is 135234413. The reversal of 135234409 is 904432531.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 135210384 + 24025 = 11628^2 + 155^2 .

It is a cyclic number.

It is not a de Polignac number, because 135234409 - 2²⁷ = 1016681 is a prime.

It is equal to p_7658014 and since 135234409 and 7658014 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 (135234479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67617204 + 67617205.

It is an arithmetic number, because the mean of its divisors is an integer number (67617205).

Almost surely, 2^135234409 is an apocalyptic number.

It is an amenable number.

135234409 is a deficient number, since it is larger than the sum of its proper divisors (1).

135234409 is an equidigital number, since it uses as much as digits as its factorization.

135234409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 135234409 is about 11629.0330208492. The cubic root of 135234409 is about 513.2895262086.

The spelling of 135234409 in words is "one hundred thirty-five million, two hundred thirty-four thousand, four hundred nine".