133261567 has 2 divisors, whose sum is σ = 133261568. Its totient is φ = 133261566.

The previous prime is 133261561. The next prime is 133261613. The reversal of 133261567 is 765162331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 133261567 - 2³ = 133261559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133261561) 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 as a sum of consecutive naturals, namely, 66630783 + 66630784.

It is an arithmetic number, because the mean of its divisors is an integer number (66630784).

Almost surely, 2^133261567 is an apocalyptic number.

133261567 is a deficient number, since it is larger than the sum of its proper divisors (1).

133261567 is an equidigital number, since it uses as much as digits as its factorization.

133261567 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22680, while the sum is 34.

The square root of 133261567 is about 11543.8973921289. The cubic root of 133261567 is about 510.7812797822.

The spelling of 133261567 in words is "one hundred thirty-three million, two hundred sixty-one thousand, five hundred sixty-seven".