135999887 has 2 divisors, whose sum is σ = 135999888. Its totient is φ = 135999886.

The previous prime is 135999869. The next prime is 135999923. The reversal of 135999887 is 788999531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 135999887 - 2⁶ = 135999823 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135999287) 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, 67999943 + 67999944.

It is an arithmetic number, because the mean of its divisors is an integer number (67999944).

Almost surely, 2^135999887 is an apocalyptic number.

135999887 is a deficient number, since it is larger than the sum of its proper divisors (1).

135999887 is an equidigital number, since it uses as much as digits as its factorization.

135999887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 59.

The square root of 135999887 is about 11661.8989448546. The cubic root of 135999887 is about 514.2561757028.

The spelling of 135999887 in words is "one hundred thirty-five million, nine hundred ninety-nine thousand, eight hundred eighty-seven".