136845385 has 4 divisors (see below), whose sum is σ = 164214468. Its totient is φ = 109476304.

The previous prime is 136845347. The next prime is 136845389. The reversal of 136845385 is 583548631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 583548631 = 61 ⋅9566371.

It can be written as a sum of positive squares in 2 ways, for example, as 79495056 + 57350329 = 8916^2 + 7573^2 .

It is a cyclic number.

It is not a de Polignac number, because 136845385 - 2¹⁷ = 136714313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136845389) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13684534 + ... + 13684543.

It is an arithmetic number, because the mean of its divisors is an integer number (41053617).

Almost surely, 2^136845385 is an apocalyptic number.

It is an amenable number.

136845385 is a deficient number, since it is larger than the sum of its proper divisors (27369083).

136845385 is an equidigital number, since it uses as much as digits as its factorization.

136845385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27369082.

The product of its digits is 345600, while the sum is 43.

The square root of 136845385 is about 11698.0932206920. The cubic root of 136845385 is about 515.3196683157.

The spelling of 136845385 in words is "one hundred thirty-six million, eight hundred forty-five thousand, three hundred eighty-five".