135743978 has 8 divisors (see below), whose sum is σ = 210184320. Its totient is φ = 65682540.

The previous prime is 135743941. The next prime is 135743981. The reversal of 135743978 is 879347531.

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

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 1094648 + ... + 1094771.

It is an arithmetic number, because the mean of its divisors is an integer number (26273040).

Almost surely, 2^135743978 is an apocalyptic number.

135743978 is a deficient number, since it is larger than the sum of its proper divisors (74440342).

135743978 is a wasteful number, since it uses less digits than its factorization.

135743978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2189452.

The product of its digits is 635040, while the sum is 47.

The square root of 135743978 is about 11650.9217661093. The cubic root of 135743978 is about 513.9334170643.

The spelling of 135743978 in words is "one hundred thirty-five million, seven hundred forty-three thousand, nine hundred seventy-eight".