135743999 has 8 divisors (see below), whose sum is σ = 149101440. Its totient is φ = 123007896.

The previous prime is 135743981. The next prime is 135744019. The reversal of 135743999 is 999347531.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 135743999 - 2²⁰ = 134695423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135743939) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 154877 + ... + 155750.

It is an arithmetic number, because the mean of its divisors is an integer number (18637680).

Almost surely, 2^135743999 is an apocalyptic number.

135743999 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

135743999 is a deficient number, since it is larger than the sum of its proper divisors (13357441).

135743999 is a wasteful number, since it uses less digits than its factorization.

135743999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310669.

The product of its digits is 918540, while the sum is 50.

The square root of 135743999 is about 11650.9226673255. The cubic root of 135743999 is about 513.9334435667.

The spelling of 135743999 in words is "one hundred thirty-five million, seven hundred forty-three thousand, nine hundred ninety-nine".