136387549 has 4 divisors (see below), whose sum is σ = 144410364. Its totient is φ = 128364736.

The previous prime is 136387547. The next prime is 136387621. The reversal of 136387549 is 945783631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 945783631 = 13 ⋅72752587.

It can be written as a sum of positive squares in 2 ways, for example, as 96924025 + 39463524 = 9845^2 + 6282^2 .

It is a cyclic number.

It is not a de Polignac number, because 136387549 - 2¹ = 136387547 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 136387499 and 136387508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136387543) 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, 4011382 + ... + 4011415.

It is an arithmetic number, because the mean of its divisors is an integer number (36102591).

Almost surely, 2^136387549 is an apocalyptic number.

It is an amenable number.

136387549 is a deficient number, since it is larger than the sum of its proper divisors (8022815).

136387549 is an equidigital number, since it uses as much as digits as its factorization.

136387549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8022814.

The product of its digits is 544320, while the sum is 46.

The square root of 136387549 is about 11678.5079954590. The cubic root of 136387549 is about 514.7443340908.

The spelling of 136387549 in words is "one hundred thirty-six million, three hundred eighty-seven thousand, five hundred forty-nine".