133239538 has 8 divisors (see below), whose sum is σ = 200490732. Its totient is φ = 66409296.

The previous prime is 133239517. The next prime is 133239539. The reversal of 133239538 is 835932331.

It can be written as a sum of positive squares in 2 ways, for example, as 121727089 + 11512449 = 11033^2 + 3393^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 133239497 and 133239506.

It is not an unprimeable number, because it can be changed into a prime (133239539) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104445 + ... + 105712.

Almost surely, 2^133239538 is an apocalyptic number.

133239538 is a deficient number, since it is larger than the sum of its proper divisors (67251194).

133239538 is a wasteful number, since it uses less digits than its factorization.

133239538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 210476.

The product of its digits is 58320, while the sum is 37.

The square root of 133239538 is about 11542.9432121968. The cubic root of 133239538 is about 510.7531330801.

The spelling of 133239538 in words is "one hundred thirty-three million, two hundred thirty-nine thousand, five hundred thirty-eight".