135668443 has 2 divisors, whose sum is σ = 135668444. Its totient is φ = 135668442.

The previous prime is 135668441. The next prime is 135668459. The reversal of 135668443 is 344866531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135668443 - 2¹ = 135668441 is a prime.

Together with 135668441, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 135668396 and 135668405.

It is not a weakly prime, because it can be changed into another prime (135668441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67834221 + 67834222.

It is an arithmetic number, because the mean of its divisors is an integer number (67834222).

Almost surely, 2^135668443 is an apocalyptic number.

135668443 is a deficient number, since it is larger than the sum of its proper divisors (1).

135668443 is an equidigital number, since it uses as much as digits as its factorization.

135668443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 207360, while the sum is 40.

The square root of 135668443 is about 11647.6797260227. The cubic root of 135668443 is about 513.8380729615.

The spelling of 135668443 in words is "one hundred thirty-five million, six hundred sixty-eight thousand, four hundred forty-three".