133409371 has 2 divisors, whose sum is σ = 133409372. Its totient is φ = 133409370.

The previous prime is 133409369. The next prime is 133409389. The reversal of 133409371 is 173904331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133409371 - 2¹ = 133409369 is a prime.

Together with 133409369, it forms a pair of twin primes.

It is equal to p_7560472 and since 133409371 and 7560472 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (133409671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66704685 + 66704686.

It is an arithmetic number, because the mean of its divisors is an integer number (66704686).

Almost surely, 2^133409371 is an apocalyptic number.

133409371 is a deficient number, since it is larger than the sum of its proper divisors (1).

133409371 is an equidigital number, since it uses as much as digits as its factorization.

133409371 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6804, while the sum is 31.

The square root of 133409371 is about 11550.2974420575. The cubic root of 133409371 is about 510.9700504427.

The spelling of 133409371 in words is "one hundred thirty-three million, four hundred nine thousand, three hundred seventy-one".