136696291 has 4 divisors (see below), whose sum is σ = 142639632. Its totient is φ = 130752952.

The previous prime is 136696249. The next prime is 136696319. The reversal of 136696291 is 192696631.

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 136696291 - 2²¹ = 134599139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136696211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2971636 + ... + 2971681.

It is an arithmetic number, because the mean of its divisors is an integer number (35659908).

Almost surely, 2^136696291 is an apocalyptic number.

136696291 is a deficient number, since it is larger than the sum of its proper divisors (5943341).

136696291 is an equidigital number, since it uses as much as digits as its factorization.

136696291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5943340.

The product of its digits is 104976, while the sum is 43.

The square root of 136696291 is about 11691.7189069871. The cubic root of 136696291 is about 515.1324521857.

The spelling of 136696291 in words is "one hundred thirty-six million, six hundred ninety-six thousand, two hundred ninety-one".