135604429 has 2 divisors, whose sum is σ = 135604430. Its totient is φ = 135604428.

The previous prime is 135604409. The next prime is 135604439. The reversal of 135604429 is 924406531.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130644900 + 4959529 = 11430^2 + 2227^2 .

It is a cyclic number.

It is not a de Polignac number, because 135604429 - 2²¹ = 133507277 is a prime.

It is a super-2 number, since 2×135604429² = 36777122328832082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 135604394 and 135604403.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135604409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67802214 + 67802215.

It is an arithmetic number, because the mean of its divisors is an integer number (67802215).

Almost surely, 2^135604429 is an apocalyptic number.

It is an amenable number.

135604429 is a deficient number, since it is larger than the sum of its proper divisors (1).

135604429 is an equidigital number, since it uses as much as digits as its factorization.

135604429 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 135604429 is about 11644.9314725334. The cubic root of 135604429 is about 513.7572435404.

The spelling of 135604429 in words is "one hundred thirty-five million, six hundred four thousand, four hundred twenty-nine".