133984538 has 4 divisors (see below), whose sum is σ = 200976810. Its totient is φ = 66992268.

The previous prime is 133984537. The next prime is 133984541. The reversal of 133984538 is 835489331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 130347889 + 3636649 = 11417^2 + 1907^2 .

It is not an unprimeable number, because it can be changed into a prime (133984537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33496133 + ... + 33496136.

Almost surely, 2^133984538 is an apocalyptic number.

133984538 is a deficient number, since it is larger than the sum of its proper divisors (66992272).

133984538 is an equidigital number, since it uses as much as digits as its factorization.

133984538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66992271.

The product of its digits is 311040, while the sum is 44.

The square root of 133984538 is about 11575.1690268436. The cubic root of 133984538 is about 511.7033116930.

The spelling of 133984538 in words is "one hundred thirty-three million, nine hundred eighty-four thousand, five hundred thirty-eight".