136423439 has 8 divisors (see below), whose sum is σ = 143825280. Its totient is φ = 129043800.

The previous prime is 136423433. The next prime is 136423471. The reversal of 136423439 is 934324631.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 136423439 - 2¹² = 136419343 is a prime.

It is a super-2 number, since 2×136423439² = 37222709417173442, 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 = 136423399 and 136423408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136423433) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7934 + ... + 18324.

It is an arithmetic number, because the mean of its divisors is an integer number (17978160).

Almost surely, 2^136423439 is an apocalyptic number.

136423439 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

136423439 is a deficient number, since it is larger than the sum of its proper divisors (7401841).

136423439 is a wasteful number, since it uses less digits than its factorization.

136423439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11101.

The product of its digits is 46656, while the sum is 35.

The square root of 136423439 is about 11680.0444776550. The cubic root of 136423439 is about 514.7894813056.

The spelling of 136423439 in words is "one hundred thirty-six million, four hundred twenty-three thousand, four hundred thirty-nine".