136588621 has 16 divisors (see below), whose sum is σ = 150195136. Its totient is φ = 123451776.

The previous prime is 136588619. The next prime is 136588633. The reversal of 136588621 is 126885631.

It is a 9-Lehmer number, since φ(136588621) divides (136588621-1)⁹.

It is a cyclic number.

It is not a de Polignac number, because 136588621 - 2¹ = 136588619 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136588681) 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 15 ways as a sum of consecutive naturals, for example, 154246 + ... + 155128.

It is an arithmetic number, because the mean of its divisors is an integer number (9387196).

Almost surely, 2^136588621 is an apocalyptic number.

It is an amenable number.

136588621 is a deficient number, since it is larger than the sum of its proper divisors (13606515).

136588621 is a wasteful number, since it uses less digits than its factorization.

136588621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1132.

The product of its digits is 69120, while the sum is 40.

The square root of 136588621 is about 11687.1134588486. The cubic root of 136588621 is about 514.9971671695.

The spelling of 136588621 in words is "one hundred thirty-six million, five hundred eighty-eight thousand, six hundred twenty-one".