135820983 has 4 divisors (see below), whose sum is σ = 181094648. Its totient is φ = 90547320.

The previous prime is 135820981. The next prime is 135820991. The reversal of 135820983 is 389028531.

135820983 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 389028531 = 3 ⋅129676177.

It is not a de Polignac number, because 135820983 - 2¹ = 135820981 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 (135820981) 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, 22636828 + ... + 22636833.

It is an arithmetic number, because the mean of its divisors is an integer number (45273662).

Almost surely, 2^135820983 is an apocalyptic number.

135820983 is a deficient number, since it is larger than the sum of its proper divisors (45273665).

135820983 is an equidigital number, since it uses as much as digits as its factorization.

135820983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45273664.

The product of its (nonzero) digits is 51840, while the sum is 39.

The square root of 135820983 is about 11654.2259717237. The cubic root of 135820983 is about 514.0305802737.

The spelling of 135820983 in words is "one hundred thirty-five million, eight hundred twenty thousand, nine hundred eighty-three".