136657 has 2 divisors, whose sum is σ = 136658. Its totient is φ = 136656.

The previous prime is 136651. The next prime is 136691. The reversal of 136657 is 756631.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123201 + 13456 = 351^2 + 116^2 .

It is a cyclic number.

It is not a de Polignac number, because 136657 - 2³ = 136649 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (136651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 68328 + 68329.

It is an arithmetic number, because the mean of its divisors is an integer number (68329).

2¹³⁶⁶⁵⁷ is an apocalyptic number.

It is an amenable number.

136657 is a deficient number, since it is larger than the sum of its proper divisors (1).

136657 is an equidigital number, since it uses as much as digits as its factorization.

136657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780, while the sum is 28.

The square root of 136657 is about 369.6714757727. The cubic root of 136657 is about 51.5083092132.

It can be divided in two parts, 13 and 6657, that added together give a triangular number (6670 = T₁₁₅).

The spelling of 136657 in words is "one hundred thirty-six thousand, six hundred fifty-seven".