133901 has 4 divisors (see below), whose sum is σ = 134652. Its totient is φ = 133152.

The previous prime is 133877. The next prime is 133919. The reversal of 133901 is 109331.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 121801 + 12100 = 349^2 + 110^2 .

It is a cyclic number.

It is not a de Polignac number, because 133901 - 2¹⁴ = 117517 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 133901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133981) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65 + ... + 521.

It is an arithmetic number, because the mean of its divisors is an integer number (33663).

2¹³³⁹⁰¹ is an apocalyptic number.

It is an amenable number.

133901 is a deficient number, since it is larger than the sum of its proper divisors (751).

133901 is an equidigital number, since it uses as much as digits as its factorization.

133901 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 750.

The product of its (nonzero) digits is 81, while the sum is 17.

The square root of 133901 is about 365.9248556739. The cubic root of 133901 is about 51.1596942309.

The spelling of 133901 in words is "one hundred thirty-three thousand, nine hundred one".