136508429 has 4 divisors (see below), whose sum is σ = 140197884. Its totient is φ = 132818976.

The previous prime is 136508401. The next prime is 136508431. The reversal of 136508429 is 924805631.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 924805631 = 17971 ⋅51461.

It can be written as a sum of positive squares in 2 ways, for example, as 86452804 + 50055625 = 9298^2 + 7075^2 .

It is a cyclic number.

It is not a de Polignac number, because 136508429 - 2⁸ = 136508173 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136508392 and 136508401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136508479) 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 in 3 ways as a sum of consecutive naturals, for example, 1844672 + ... + 1844745.

It is an arithmetic number, because the mean of its divisors is an integer number (35049471).

Almost surely, 2^136508429 is an apocalyptic number.

It is an amenable number.

136508429 is a deficient number, since it is larger than the sum of its proper divisors (3689455).

136508429 is an equidigital number, since it uses as much as digits as its factorization.

136508429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3689454.

The product of its (nonzero) digits is 51840, while the sum is 38.

The square root of 136508429 is about 11683.6821678784. The cubic root of 136508429 is about 514.8963614621.

The spelling of 136508429 in words is "one hundred thirty-six million, five hundred eight thousand, four hundred twenty-nine".