133931005 has 16 divisors (see below), whose sum is σ = 178665984. Its totient is φ = 95711040.

The previous prime is 133930997. The next prime is 133931029. The reversal of 133931005 is 500139331.

It is not a de Polignac number, because 133931005 - 2³ = 133930997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31219 + ... + 35248.

It is an arithmetic number, because the mean of its divisors is an integer number (11166624).

Almost surely, 2^133931005 is an apocalyptic number.

It is an amenable number.

133931005 is a deficient number, since it is larger than the sum of its proper divisors (44734979).

133931005 is a wasteful number, since it uses less digits than its factorization.

133931005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66516.

The product of its (nonzero) digits is 1215, while the sum is 25.

The square root of 133931005 is about 11572.8563889819. The cubic root of 133931005 is about 511.6351529266.

The spelling of 133931005 in words is "one hundred thirty-three million, nine hundred thirty-one thousand, five".