133973647 has 2 divisors, whose sum is σ = 133973648. Its totient is φ = 133973646.

The previous prime is 133973639. The next prime is 133973657. The reversal of 133973647 is 746379331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133973647 - 2³ = 133973639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133973627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66986823 + 66986824.

It is an arithmetic number, because the mean of its divisors is an integer number (66986824).

Almost surely, 2^133973647 is an apocalyptic number.

133973647 is a deficient number, since it is larger than the sum of its proper divisors (1).

133973647 is an equidigital number, since it uses as much as digits as its factorization.

133973647 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 285768, while the sum is 43.

The square root of 133973647 is about 11574.6985705892. The cubic root of 133973647 is about 511.6894466310.

The spelling of 133973647 in words is "one hundred thirty-three million, nine hundred seventy-three thousand, six hundred forty-seven".