136647197 has 4 divisors (see below), whose sum is σ = 139225500. Its totient is φ = 134068896.

The previous prime is 136647193. The next prime is 136647223. The reversal of 136647197 is 791746631.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 91030681 + 45616516 = 9541^2 + 6754^2 .

It is a cyclic number.

It is not a de Polignac number, because 136647197 - 2² = 136647193 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136647191) 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, 1289072 + ... + 1289177.

It is an arithmetic number, because the mean of its divisors is an integer number (34806375).

Almost surely, 2^136647197 is an apocalyptic number.

It is an amenable number.

136647197 is a deficient number, since it is larger than the sum of its proper divisors (2578303).

136647197 is an equidigital number, since it uses as much as digits as its factorization.

136647197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2578302.

The product of its digits is 190512, while the sum is 44.

The square root of 136647197 is about 11689.6191982459. The cubic root of 136647197 is about 515.0707754554.

The spelling of 136647197 in words is "one hundred thirty-six million, six hundred forty-seven thousand, one hundred ninety-seven".