133923517 has 12 divisors (see below), whose sum is σ = 167773116. Its totient is φ = 105960960.

The previous prime is 133923509. The next prime is 133923541. The reversal of 133923517 is 715329331.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 55264356 + 78659161 = 7434^2 + 8869^2 .

It is not a de Polignac number, because 133923517 - 2³ = 133923509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133923547) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 104484 + ... + 105757.

It is an arithmetic number, because the mean of its divisors is an integer number (13981093).

Almost surely, 2^133923517 is an apocalyptic number.

It is an amenable number.

133923517 is a deficient number, since it is larger than the sum of its proper divisors (33849599).

133923517 is a wasteful number, since it uses less digits than its factorization.

133923517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210268 (or 210261 counting only the distinct ones).

The product of its digits is 17010, while the sum is 34.

The square root of 133923517 is about 11572.5328688235. The cubic root of 133923517 is about 511.6256176802.

The spelling of 133923517 in words is "one hundred thirty-three million, nine hundred twenty-three thousand, five hundred seventeen".