133311985 has 8 divisors (see below), whose sum is σ = 165490920. Its totient is φ = 102971904.

The previous prime is 133311967. The next prime is 133311989. The reversal of 133311985 is 589113331.

It can be written as a sum of positive squares in 4 ways, for example, as 4648336 + 128663649 = 2156^2 + 11343^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 133311985 - 2⁵ = 133311953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 133311985.

It is not an unprimeable number, because it can be changed into a prime (133311989) 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 in 7 ways as a sum of consecutive naturals, for example, 459552 + ... + 459841.

It is an arithmetic number, because the mean of its divisors is an integer number (20686365).

Almost surely, 2^133311985 is an apocalyptic number.

It is an amenable number.

133311985 is a deficient number, since it is larger than the sum of its proper divisors (32178935).

133311985 is an equidigital number, since it uses as much as digits as its factorization.

133311985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 919427.

The product of its digits is 9720, while the sum is 34.

The square root of 133311985 is about 11546.0809368374. The cubic root of 133311985 is about 510.8456877584.

The spelling of 133311985 in words is "one hundred thirty-three million, three hundred eleven thousand, nine hundred eighty-five".