133020239 has 4 divisors (see below), whose sum is σ = 145113000. Its totient is φ = 120927480.

The previous prime is 133020229. The next prime is 133020241. The reversal of 133020239 is 932020331.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133020239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133020229) 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 3 ways as a sum of consecutive naturals, for example, 6046364 + ... + 6046385.

It is an arithmetic number, because the mean of its divisors is an integer number (36278250).

Almost surely, 2^133020239 is an apocalyptic number.

133020239 is a deficient number, since it is larger than the sum of its proper divisors (12092761).

133020239 is a wasteful number, since it uses less digits than its factorization.

133020239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12092760.

The product of its (nonzero) digits is 972, while the sum is 23.

The square root of 133020239 is about 11533.4400332251. The cubic root of 133020239 is about 510.4727629527.

The spelling of 133020239 in words is "one hundred thirty-three million, twenty thousand, two hundred thirty-nine".