136963657 has 4 divisors (see below), whose sum is σ = 140304276. Its totient is φ = 133623040.

The previous prime is 136963637. The next prime is 136963669. The reversal of 136963657 is 756369631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 756369631 = 9851 ⋅76781.

It can be written as a sum of positive squares in 2 ways, for example, as 44342281 + 92621376 = 6659^2 + 9624^2 .

It is a cyclic number.

It is not a de Polignac number, because 136963657 - 2¹⁵ = 136930889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136963627) 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, 1670248 + ... + 1670329.

It is an arithmetic number, because the mean of its divisors is an integer number (35076069).

Almost surely, 2^136963657 is an apocalyptic number.

It is an amenable number.

136963657 is a deficient number, since it is larger than the sum of its proper divisors (3340619).

136963657 is an equidigital number, since it uses as much as digits as its factorization.

136963657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3340618.

The product of its digits is 612360, while the sum is 46.

The square root of 136963657 is about 11703.1473117277. The cubic root of 136963657 is about 515.4680848119.

The spelling of 136963657 in words is "one hundred thirty-six million, nine hundred sixty-three thousand, six hundred fifty-seven".