135428999 has 2 divisors, whose sum is σ = 135429000. Its totient is φ = 135428998.

The previous prime is 135428963. The next prime is 135429001. The reversal of 135428999 is 999824531.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (999824531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135428999 - 2²⁴ = 118651783 is a prime.

Together with 135429001, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135428929) 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, 67714499 + 67714500.

It is an arithmetic number, because the mean of its divisors is an integer number (67714500).

Almost surely, 2^135428999 is an apocalyptic number.

135428999 is a deficient number, since it is larger than the sum of its proper divisors (1).

135428999 is an equidigital number, since it uses as much as digits as its factorization.

135428999 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 699840, while the sum is 50.

The square root of 135428999 is about 11637.3965731172. The cubic root of 135428999 is about 513.5356005161.

The spelling of 135428999 in words is "one hundred thirty-five million, four hundred twenty-eight thousand, nine hundred ninety-nine".