133409671 has 2 divisors, whose sum is σ = 133409672. Its totient is φ = 133409670.

The previous prime is 133409669. The next prime is 133409681. The reversal of 133409671 is 176904331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133409671 - 2¹ = 133409669 is a prime.

It is a super-3 number, since 3×133409671³ (a number of 25 digits) contains 333 as substring.

Together with 133409669, it forms a pair of twin primes.

It is equal to p_7560484 and since 133409671 and 7560484 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133409681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66704835 + 66704836.

It is an arithmetic number, because the mean of its divisors is an integer number (66704836).

Almost surely, 2^133409671 is an apocalyptic number.

133409671 is a deficient number, since it is larger than the sum of its proper divisors (1).

133409671 is an equidigital number, since it uses as much as digits as its factorization.

133409671 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 13608, while the sum is 34.

The square root of 133409671 is about 11550.3104287287. The cubic root of 133409671 is about 510.9704334516.

The spelling of 133409671 in words is "one hundred thirty-three million, four hundred nine thousand, six hundred seventy-one".