136088661 has 4 divisors (see below), whose sum is σ = 181451552. Its totient is φ = 90725772.

The previous prime is 136088657. The next prime is 136088731. The reversal of 136088661 is 166880631.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 166880631 = 3 ⋅55626877.

It is not a de Polignac number, because 136088661 - 2² = 136088657 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 (136080661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22681441 + ... + 22681446.

It is an arithmetic number, because the mean of its divisors is an integer number (45362888).

Almost surely, 2^136088661 is an apocalyptic number.

It is an amenable number.

136088661 is a deficient number, since it is larger than the sum of its proper divisors (45362891).

136088661 is an equidigital number, since it uses as much as digits as its factorization.

136088661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45362890.

The product of its (nonzero) digits is 41472, while the sum is 39.

The square root of 136088661 is about 11665.7044793703. The cubic root of 136088661 is about 514.3680450312.

The spelling of 136088661 in words is "one hundred thirty-six million, eighty-eight thousand, six hundred sixty-one".