135755999 has 4 divisors (see below), whose sum is σ = 143741664. Its totient is φ = 127770336.

The previous prime is 135755993. The next prime is 135756001. The reversal of 135755999 is 999557531.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999557531 = 7 ⋅142793933.

It is a cyclic number.

It is not a de Polignac number, because 135755999 - 2¹⁶ = 135690463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 135755999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135755993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3992807 + ... + 3992840.

It is an arithmetic number, because the mean of its divisors is an integer number (35935416).

Almost surely, 2^135755999 is an apocalyptic number.

135755999 is a deficient number, since it is larger than the sum of its proper divisors (7985665).

135755999 is an equidigital number, since it uses as much as digits as its factorization.

135755999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7985664.

The product of its digits is 1913625, while the sum is 53.

The square root of 135755999 is about 11651.4376366181. The cubic root of 135755999 is about 513.9485873168.

The spelling of 135755999 in words is "one hundred thirty-five million, seven hundred fifty-five thousand, nine hundred ninety-nine".