133688867 has 16 divisors (see below), whose sum is σ = 155040480. Its totient is φ = 114166272.

The previous prime is 133688813. The next prime is 133688887. The reversal of 133688867 is 768886331.

It is a cyclic number.

It is not a de Polignac number, because 133688867 - 2¹⁶ = 133623331 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133688887) 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 in 15 ways as a sum of consecutive naturals, for example, 7913 + ... + 18165.

It is an arithmetic number, because the mean of its divisors is an integer number (9690030).

Almost surely, 2^133688867 is an apocalyptic number.

133688867 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

133688867 is a deficient number, since it is larger than the sum of its proper divisors (21351613).

133688867 is a wasteful number, since it uses less digits than its factorization.

133688867 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10342.

The product of its digits is 1161216, while the sum is 50.

The square root of 133688867 is about 11562.3901940732. The cubic root of 133688867 is about 511.3266332600.

The spelling of 133688867 in words is "one hundred thirty-three million, six hundred eighty-eight thousand, eight hundred sixty-seven".