133939671 has 4 divisors (see below), whose sum is σ = 178586232. Its totient is φ = 89293112.

The previous prime is 133939657. The next prime is 133939679. The reversal of 133939671 is 176939331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 176939331 = 3 ⋅58979777.

It is a cyclic number.

It is not a de Polignac number, because 133939671 - 2⁷ = 133939543 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133939679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22323276 + ... + 22323281.

It is an arithmetic number, because the mean of its divisors is an integer number (44646558).

Almost surely, 2^133939671 is an apocalyptic number.

133939671 is a deficient number, since it is larger than the sum of its proper divisors (44646561).

133939671 is an equidigital number, since it uses as much as digits as its factorization.

133939671 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44646560.

The product of its digits is 91854, while the sum is 42.

The square root of 133939671 is about 11573.2307935166. The cubic root of 133939671 is about 511.6461877989.

The spelling of 133939671 in words is "one hundred thirty-three million, nine hundred thirty-nine thousand, six hundred seventy-one".