135601643 has 2 divisors, whose sum is σ = 135601644. Its totient is φ = 135601642.

The previous prime is 135601621. The next prime is 135601649. The reversal of 135601643 is 346106531.

It is a happy number.

135601643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (346106531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135601643 - 2⁶ = 135601579 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (135601649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67800821 + 67800822.

It is an arithmetic number, because the mean of its divisors is an integer number (67800822).

Almost surely, 2^135601643 is an apocalyptic number.

135601643 is a deficient number, since it is larger than the sum of its proper divisors (1).

135601643 is an equidigital number, since it uses as much as digits as its factorization.

135601643 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 135601643 is about 11644.8118490596. The cubic root of 135601643 is about 513.7537251266.

The spelling of 135601643 in words is "one hundred thirty-five million, six hundred one thousand, six hundred forty-three".