136813441 has 4 divisors (see below), whose sum is σ = 136882900. Its totient is φ = 136743984.

The previous prime is 136813429. The next prime is 136813451. The reversal of 136813441 is 144318631.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 144318631 = 397 ⋅363523.

It can be written as a sum of positive squares in 2 ways, for example, as 67174416 + 69639025 = 8196^2 + 8345^2 .

It is a cyclic number.

It is not a de Polignac number, because 136813441 - 2¹⁵ = 136780673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136813451) 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, 31686 + ... + 35743.

It is an arithmetic number, because the mean of its divisors is an integer number (34220725).

Almost surely, 2^136813441 is an apocalyptic number.

It is an amenable number.

136813441 is a deficient number, since it is larger than the sum of its proper divisors (69459).

136813441 is an equidigital number, since it uses as much as digits as its factorization.

136813441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69458.

The product of its digits is 6912, while the sum is 31.

The square root of 136813441 is about 11696.7277902839. The cubic root of 136813441 is about 515.2795679438.

The spelling of 136813441 in words is "one hundred thirty-six million, eight hundred thirteen thousand, four hundred forty-one".