133767971 has 2 divisors, whose sum is σ = 133767972. Its totient is φ = 133767970.

The previous prime is 133767911. The next prime is 133767973. The reversal of 133767971 is 179767331.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 133767971 - 2¹⁰ = 133766947 is a prime.

Together with 133767973, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (133767973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66883985 + 66883986.

It is an arithmetic number, because the mean of its divisors is an integer number (66883986).

Almost surely, 2^133767971 is an apocalyptic number.

133767971 is a deficient number, since it is larger than the sum of its proper divisors (1).

133767971 is an equidigital number, since it uses as much as digits as its factorization.

133767971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 166698, while the sum is 44.

The square root of 133767971 is about 11565.8104342065. The cubic root of 133767971 is about 511.4274644108.

The spelling of 133767971 in words is "one hundred thirty-three million, seven hundred sixty-seven thousand, nine hundred seventy-one".