136640513 has 2 divisors, whose sum is σ = 136640514. Its totient is φ = 136640512.

The previous prime is 136640507. The next prime is 136640527. The reversal of 136640513 is 315046631.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 115175824 + 21464689 = 10732^2 + 4633^2 .

It is a cyclic number.

It is not a de Polignac number, because 136640513 - 2¹² = 136636417 is a prime.

It is not a weakly prime, because it can be changed into another prime (136640503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68320256 + 68320257.

It is an arithmetic number, because the mean of its divisors is an integer number (68320257).

Almost surely, 2^136640513 is an apocalyptic number.

It is an amenable number.

136640513 is a deficient number, since it is larger than the sum of its proper divisors (1).

136640513 is an equidigital number, since it uses as much as digits as its factorization.

136640513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 136640513 is about 11689.3333000646. Note that the first 4 decimals coincide. The cubic root of 136640513 is about 515.0623772122.

The spelling of 136640513 in words is "one hundred thirty-six million, six hundred forty thousand, five hundred thirteen".