136866601 has 3 divisors (see below), whose sum is σ = 136878301. Its totient is φ = 136854902.

The previous prime is 136866599. The next prime is 136866623. The reversal of 136866601 is 106668631.

It is a happy number.

The square root of 136866601 is 11699.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 106668631 = 9547 ⋅11173.

It is not a de Polignac number, because 136866601 - 2¹ = 136866599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136866641) 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 2 ways as a sum of consecutive naturals, for example, 5850 + ... + 17548.

Almost surely, 2^136866601 is an apocalyptic number.

136866601 is the 11699-th square number.

136866601 is the 5850-th centered octagonal number.

It is an amenable number.

136866601 is a deficient number, since it is larger than the sum of its proper divisors (11700).

136866601 is an frugal number, since it uses more digits than its factorization.

136866601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23398 (or 11699 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 37.

The cubic root of 136866601 is about 515.3462980218.

The spelling of 136866601 in words is "one hundred thirty-six million, eight hundred sixty-six thousand, six hundred one".