136680235 has 4 divisors (see below), whose sum is σ = 164016288. Its totient is φ = 109344184.

The previous prime is 136680179. The next prime is 136680239. The reversal of 136680235 is 532086631.

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

It is a cyclic number.

It is not a de Polignac number, because 136680235 - 2²¹ = 134583083 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 136680235.

It is not an unprimeable number, because it can be changed into a prime (136680239) 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, 13668019 + ... + 13668028.

It is an arithmetic number, because the mean of its divisors is an integer number (41004072).

Almost surely, 2^136680235 is an apocalyptic number.

136680235 is a deficient number, since it is larger than the sum of its proper divisors (27336053).

136680235 is an equidigital number, since it uses as much as digits as its factorization.

136680235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27336052.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 136680235 is about 11691.0322469832. The cubic root of 136680235 is about 515.1122826784.

The spelling of 136680235 in words is "one hundred thirty-six million, six hundred eighty thousand, two hundred thirty-five".