135775399 has 2 divisors, whose sum is σ = 135775400. Its totient is φ = 135775398.

The previous prime is 135775397. The next prime is 135775427. The reversal of 135775399 is 993577531.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (993577531) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 135775399 - 2¹ = 135775397 is a prime.

Together with 135775397, it forms a pair of twin primes.

It is equal to p_7686787 and since 135775399 and 7686787 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (135775397) 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, 67887699 + 67887700.

It is an arithmetic number, because the mean of its divisors is an integer number (67887700).

Almost surely, 2^135775399 is an apocalyptic number.

135775399 is a deficient number, since it is larger than the sum of its proper divisors (1).

135775399 is an equidigital number, since it uses as much as digits as its factorization.

135775399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 893025, while the sum is 49.

The square root of 135775399 is about 11652.2701221693. The cubic root of 135775399 is about 513.9730678253.

The spelling of 135775399 in words is "one hundred thirty-five million, seven hundred seventy-five thousand, three hundred ninety-nine".