136423943 has 4 divisors (see below), whose sum is σ = 136489920. Its totient is φ = 136357968.

The previous prime is 136423927. The next prime is 136423951. The reversal of 136423943 is 349324631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 349324631 = 15773 ⋅22147.

It is a cyclic number.

It is not a de Polignac number, because 136423943 - 2⁴ = 136423927 is a prime.

It is a super-2 number, since 2×136423943² = 37222984447334498, 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 (136423043) 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, 29783 + ... + 34056.

It is an arithmetic number, because the mean of its divisors is an integer number (34122480).

Almost surely, 2^136423943 is an apocalyptic number.

136423943 is a deficient number, since it is larger than the sum of its proper divisors (65977).

136423943 is an equidigital number, since it uses as much as digits as its factorization.

136423943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65976.

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

The square root of 136423943 is about 11680.0660528954. The cubic root of 136423943 is about 514.7901152474.

The spelling of 136423943 in words is "one hundred thirty-six million, four hundred twenty-three thousand, nine hundred forty-three".