133929173 has 4 divisors (see below), whose sum is σ = 153061920. Its totient is φ = 114796428.

The previous prime is 133929139. The next prime is 133929193. The reversal of 133929173 is 371929331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 133929173 - 2⁶ = 133929109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133929193) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9566363 + ... + 9566376.

It is an arithmetic number, because the mean of its divisors is an integer number (38265480).

Almost surely, 2^133929173 is an apocalyptic number.

It is an amenable number.

133929173 is a deficient number, since it is larger than the sum of its proper divisors (19132747).

133929173 is an equidigital number, since it uses as much as digits as its factorization.

133929173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19132746.

The product of its digits is 30618, while the sum is 38.

The square root of 133929173 is about 11572.7772379840. Note that the first 3 decimals coincide. The cubic root of 133929173 is about 511.6328200840.

The spelling of 133929173 in words is "one hundred thirty-three million, nine hundred twenty-nine thousand, one hundred seventy-three".