135820317 has 4 divisors (see below), whose sum is σ = 181093760. Its totient is φ = 90546876.

The previous prime is 135820283. The next prime is 135820337. The reversal of 135820317 is 713028531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 135820317 - 2¹⁵ = 135787549 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 (135820337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22636717 + ... + 22636722.

It is an arithmetic number, because the mean of its divisors is an integer number (45273440).

Almost surely, 2^135820317 is an apocalyptic number.

It is an amenable number.

135820317 is a deficient number, since it is larger than the sum of its proper divisors (45273443).

135820317 is an equidigital number, since it uses as much as digits as its factorization.

135820317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45273442.

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 135820317 is about 11654.1973983625. The cubic root of 135820317 is about 514.0297400871.

Adding to 135820317 its reverse (713028531), we get a palindrome (848848848).

The spelling of 135820317 in words is "one hundred thirty-five million, eight hundred twenty thousand, three hundred seventeen".