135601943 has 2 divisors, whose sum is σ = 135601944. Its totient is φ = 135601942.

The previous prime is 135601937. The next prime is 135601957. The reversal of 135601943 is 349106531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135601943 - 2¹⁴ = 135585559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135601933) 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, 67800971 + 67800972.

It is an arithmetic number, because the mean of its divisors is an integer number (67800972).

Almost surely, 2^135601943 is an apocalyptic number.

135601943 is a deficient number, since it is larger than the sum of its proper divisors (1).

135601943 is an equidigital number, since it uses as much as digits as its factorization.

135601943 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 135601943 is about 11644.8247303255. The cubic root of 135601943 is about 513.7541039961.

The spelling of 135601943 in words is "one hundred thirty-five million, six hundred one thousand, nine hundred forty-three".