135666938 has 16 divisors (see below), whose sum is σ = 228001824. Its totient is φ = 59999760.

The previous prime is 135666931. The next prime is 135666961. The reversal of 135666938 is 839666531.

It is a junction number, because it is equal to n+sod(n) for n = 135666892 and 135666901.

It is not an unprimeable number, because it can be changed into a prime (135666931) 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 in 7 ways as a sum of consecutive naturals, for example, 82520 + ... + 84147.

It is an arithmetic number, because the mean of its divisors is an integer number (14250114).

Almost surely, 2^135666938 is an apocalyptic number.

135666938 is a deficient number, since it is larger than the sum of its proper divisors (92334886).

135666938 is a wasteful number, since it uses less digits than its factorization.

135666938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166717.

The product of its digits is 699840, while the sum is 47.

The square root of 135666938 is about 11647.6151207017. The cubic root of 135666938 is about 513.8361729148.

The spelling of 135666938 in words is "one hundred thirty-five million, six hundred sixty-six thousand, nine hundred thirty-eight".