136423447 has 4 divisors (see below), whose sum is σ = 138344976. Its totient is φ = 134501920.

The previous prime is 136423433. The next prime is 136423471. The reversal of 136423447 is 744324631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 744324631 = 239 ⋅3114329.

It is a cyclic number.

It is not a de Polignac number, because 136423447 - 2²³ = 128034839 is a prime.

It is a super-2 number, since 2×136423447² = 37222713782723618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136423247) 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, 960658 + ... + 960799.

It is an arithmetic number, because the mean of its divisors is an integer number (34586244).

Almost surely, 2^136423447 is an apocalyptic number.

136423447 is a deficient number, since it is larger than the sum of its proper divisors (1921529).

136423447 is an equidigital number, since it uses as much as digits as its factorization.

136423447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921528.

The product of its digits is 48384, while the sum is 34.

The square root of 136423447 is about 11680.0448201195. The cubic root of 136423447 is about 514.7894913682.

The spelling of 136423447 in words is "one hundred thirty-six million, four hundred twenty-three thousand, four hundred forty-seven".