136814389 has 4 divisors (see below), whose sum is σ = 136838700. Its totient is φ = 136790080.

The previous prime is 136814387. The next prime is 136814393. The reversal of 136814389 is 983418631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 983418631 = 13 ⋅75647587.

It can be written as a sum of positive squares in 2 ways, for example, as 8898289 + 127916100 = 2983^2 + 11310^2 .

It is a cyclic number.

It is not a de Polignac number, because 136814389 - 2¹ = 136814387 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (136814387) 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, 1119 + ... + 16579.

It is an arithmetic number, because the mean of its divisors is an integer number (34209675).

Almost surely, 2^136814389 is an apocalyptic number.

It is an amenable number.

136814389 is a deficient number, since it is larger than the sum of its proper divisors (24311).

136814389 is an equidigital number, since it uses as much as digits as its factorization.

136814389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24310.

The product of its digits is 124416, while the sum is 43.

The square root of 136814389 is about 11696.7683143679. The cubic root of 136814389 is about 515.2807580898.

The spelling of 136814389 in words is "one hundred thirty-six million, eight hundred fourteen thousand, three hundred eighty-nine".