135684943 has 2 divisors, whose sum is σ = 135684944. Its totient is φ = 135684942.

The previous prime is 135684931. The next prime is 135684959. The reversal of 135684943 is 349486531.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-135684943 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135684943.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135684743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67842471 + 67842472.

It is an arithmetic number, because the mean of its divisors is an integer number (67842472).

Almost surely, 2^135684943 is an apocalyptic number.

135684943 is a deficient number, since it is larger than the sum of its proper divisors (1).

135684943 is an equidigital number, since it uses as much as digits as its factorization.

135684943 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 311040, while the sum is 43.

The square root of 135684943 is about 11648.3880000625. The cubic root of 135684943 is about 513.8589031176.

The spelling of 135684943 in words is "one hundred thirty-five million, six hundred eighty-four thousand, nine hundred forty-three".