135969943 has 2 divisors, whose sum is σ = 135969944. Its totient is φ = 135969942.

The previous prime is 135969941. The next prime is 135969959. The reversal of 135969943 is 349969531.

135969943 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 135969943 - 2¹ = 135969941 is a prime.

Together with 135969941, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135969941) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67984971 + 67984972.

It is an arithmetic number, because the mean of its divisors is an integer number (67984972).

Almost surely, 2^135969943 is an apocalyptic number.

135969943 is a deficient number, since it is larger than the sum of its proper divisors (1).

135969943 is an equidigital number, since it uses as much as digits as its factorization.

135969943 is an evil number, because the sum of its binary digits is even.

The product of its digits is 787320, while the sum is 49.

The square root of 135969943 is about 11660.6150352372. The cubic root of 135969943 is about 514.2184305312.

The spelling of 135969943 in words is "one hundred thirty-five million, nine hundred sixty-nine thousand, nine hundred forty-three".