136720885 has 32 divisors (see below), whose sum is σ = 202798080. Its totient is φ = 86341632.

The previous prime is 136720879. The next prime is 136720907. The reversal of 136720885 is 588027631.

It is not a de Polignac number, because 136720885 - 2⁵ = 136720853 is a prime.

It is a congruent number.

It is an unprimeable number.

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 31 ways as a sum of consecutive naturals, for example, 25521 + ... + 30409.

It is an arithmetic number, because the mean of its divisors is an integer number (6337440).

Almost surely, 2^136720885 is an apocalyptic number.

It is an amenable number.

136720885 is a deficient number, since it is larger than the sum of its proper divisors (66077195).

136720885 is a wasteful number, since it uses less digits than its factorization.

136720885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4965.

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 136720885 is about 11692.7706297524. The cubic root of 136720885 is about 515.1633440451.

The spelling of 136720885 in words is "one hundred thirty-six million, seven hundred twenty thousand, eight hundred eighty-five".