135239983 has 2 divisors, whose sum is σ = 135239984. Its totient is φ = 135239982.

The previous prime is 135239971. The next prime is 135240013. The reversal of 135239983 is 389932531.

135239983 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135239983 - 2¹³ = 135231791 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135239903) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67619991 + 67619992.

It is an arithmetic number, because the mean of its divisors is an integer number (67619992).

Almost surely, 2^135239983 is an apocalyptic number.

135239983 is a deficient number, since it is larger than the sum of its proper divisors (1).

135239983 is an equidigital number, since it uses as much as digits as its factorization.

135239983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 174960, while the sum is 43.

The square root of 135239983 is about 11629.2726771712. The cubic root of 135239983 is about 513.2965782514.

The spelling of 135239983 in words is "one hundred thirty-five million, two hundred thirty-nine thousand, nine hundred eighty-three".