136523137 has 2 divisors, whose sum is σ = 136523138. Its totient is φ = 136523136.

The previous prime is 136523117. The next prime is 136523161. The reversal of 136523137 is 731325631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 92910321 + 43612816 = 9639^2 + 6604^2 .

It is a cyclic number.

It is not a de Polignac number, because 136523137 - 2¹⁵ = 136490369 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 136523099 and 136523108.

It is not a weakly prime, because it can be changed into another prime (136523117) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68261568 + 68261569.

It is an arithmetic number, because the mean of its divisors is an integer number (68261569).

Almost surely, 2^136523137 is an apocalyptic number.

It is an amenable number.

136523137 is a deficient number, since it is larger than the sum of its proper divisors (1).

136523137 is an equidigital number, since it uses as much as digits as its factorization.

136523137 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11340, while the sum is 31.

The square root of 136523137 is about 11684.3115757840. The cubic root of 136523137 is about 514.9148531742.

Adding to 136523137 its reverse (731325631), we get a palindrome (867848768).

The spelling of 136523137 in words is "one hundred thirty-six million, five hundred twenty-three thousand, one hundred thirty-seven".