136523943 has 12 divisors (see below), whose sum is σ = 199903600. Its totient is φ = 89768736.

The previous prime is 136523941. The next prime is 136523951. The reversal of 136523943 is 349325631.

It is a happy number.

It is not a de Polignac number, because 136523943 - 2¹ = 136523941 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136523898 and 136523907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136523941) 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 11 ways as a sum of consecutive naturals, for example, 103243 + ... + 104556.

Almost surely, 2^136523943 is an apocalyptic number.

136523943 is a deficient number, since it is larger than the sum of its proper divisors (63379657).

136523943 is a wasteful number, since it uses less digits than its factorization.

136523943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207878 (or 207875 counting only the distinct ones).

The product of its digits is 58320, while the sum is 36.

The square root of 136523943 is about 11684.3460664258. The cubic root of 136523943 is about 514.9158664837.

The spelling of 136523943 in words is "one hundred thirty-six million, five hundred twenty-three thousand, nine hundred forty-three".