133923518 has 8 divisors (see below), whose sum is σ = 212702112. Its totient is φ = 63022816.

The previous prime is 133923509. The next prime is 133923541. The reversal of 133923518 is 815329331.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1969430 + ... + 1969497.

It is an arithmetic number, because the mean of its divisors is an integer number (26587764).

Almost surely, 2^133923518 is an apocalyptic number.

133923518 is a deficient number, since it is larger than the sum of its proper divisors (78778594).

133923518 is a wasteful number, since it uses less digits than its factorization.

133923518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3938946.

The product of its digits is 19440, while the sum is 35.

The square root of 133923518 is about 11572.5329120292. The cubic root of 133923518 is about 511.6256189536.

The spelling of 133923518 in words is "one hundred thirty-three million, nine hundred twenty-three thousand, five hundred eighteen".