135856603 has 2 divisors, whose sum is σ = 135856604. Its totient is φ = 135856602.

The previous prime is 135856597. The next prime is 135856661. The reversal of 135856603 is 306658531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135856603 - 2²⁵ = 102302171 is a prime.

It is not a weakly prime, because it can be changed into another prime (135806603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 67928301 + 67928302.

It is an arithmetic number, because the mean of its divisors is an integer number (67928302).

Almost surely, 2^135856603 is an apocalyptic number.

135856603 is a deficient number, since it is larger than the sum of its proper divisors (1).

135856603 is an equidigital number, since it uses as much as digits as its factorization.

135856603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 37.

The square root of 135856603 is about 11655.7540725600. The cubic root of 135856603 is about 514.0755123808.

The spelling of 135856603 in words is "one hundred thirty-five million, eight hundred fifty-six thousand, six hundred three".