135998943 has 8 divisors (see below), whose sum is σ = 181392048. Its totient is φ = 90635904.

The previous prime is 135998917. The next prime is 135998959. The reversal of 135998943 is 349899531.

It is a happy number.

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

It is not a de Polignac number, because 135998943 - 2⁹ = 135998431 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (135998983) 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, 7105 + ... + 17957.

It is an arithmetic number, because the mean of its divisors is an integer number (22674006).

Almost surely, 2^135998943 is an apocalyptic number.

135998943 is a deficient number, since it is larger than the sum of its proper divisors (45393105).

135998943 is a wasteful number, since it uses less digits than its factorization.

135998943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15033.

The product of its digits is 1049760, while the sum is 51.

The square root of 135998943 is about 11661.8584711014. The cubic root of 135998943 is about 514.2549858514.

The spelling of 135998943 in words is "one hundred thirty-five million, nine hundred ninety-eight thousand, nine hundred forty-three".