136423429 has 4 divisors (see below), whose sum is σ = 136676140. Its totient is φ = 136170720.

The previous prime is 136423421. The next prime is 136423433. The reversal of 136423429 is 924324631.

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: 924324631 = 4091 ⋅225941.

It can be written as a sum of positive squares in 2 ways, for example, as 24275329 + 112148100 = 4927^2 + 10590^2 .

It is a cyclic number.

It is not a de Polignac number, because 136423429 - 2³ = 136423421 is a prime.

It is a super-2 number, since 2×136423429² = 37222703960236082, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136423394 and 136423403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136423421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125544 + ... + 126625.

It is an arithmetic number, because the mean of its divisors is an integer number (34169035).

Almost surely, 2^136423429 is an apocalyptic number.

It is an amenable number.

136423429 is a deficient number, since it is larger than the sum of its proper divisors (252711).

136423429 is an equidigital number, since it uses as much as digits as its factorization.

136423429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252710.

The product of its digits is 31104, while the sum is 34.

The square root of 136423429 is about 11680.0440495745. The cubic root of 136423429 is about 514.7894687274.

It can be divided in two parts, 13642 and 3429, that added together give a palindrome (17071).

The spelling of 136423429 in words is "one hundred thirty-six million, four hundred twenty-three thousand, four hundred twenty-nine".