135320839 has 2 divisors, whose sum is σ = 135320840. Its totient is φ = 135320838.

The previous prime is 135320837. The next prime is 135320863. The reversal of 135320839 is 938023531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135320839 - 2¹ = 135320837 is a prime.

Together with 135320837, it forms a pair of twin primes.

It is equal to p_7662616 and since 135320839 and 7662616 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135320837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67660419 + 67660420.

It is an arithmetic number, because the mean of its divisors is an integer number (67660420).

Almost surely, 2^135320839 is an apocalyptic number.

135320839 is a deficient number, since it is larger than the sum of its proper divisors (1).

135320839 is an equidigital number, since it uses as much as digits as its factorization.

135320839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 135320839 is about 11632.7485574132. The cubic root of 135320839 is about 513.3988528372.

The spelling of 135320839 in words is "one hundred thirty-five million, three hundred twenty thousand, eight hundred thirty-nine".