133239537 has 12 divisors (see below), whose sum is σ = 193371984. Its totient is φ = 88404120.

The previous prime is 133239517. The next prime is 133239539. The reversal of 133239537 is 735932331.

It is not a de Polignac number, because 133239537 - 2⁶ = 133239473 is a prime.

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 11 ways as a sum of consecutive naturals, for example, 33183 + ... + 36980.

It is an arithmetic number, because the mean of its divisors is an integer number (16114332).

Almost surely, 2^133239537 is an apocalyptic number.

It is an amenable number.

133239537 is a deficient number, since it is larger than the sum of its proper divisors (60132447).

133239537 is a wasteful number, since it uses less digits than its factorization.

133239537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70380 (or 70377 counting only the distinct ones).

The product of its digits is 51030, while the sum is 36.

The square root of 133239537 is about 11542.9431688803. The cubic root of 133239537 is about 510.7531318023.

The spelling of 133239537 in words is "one hundred thirty-three million, two hundred thirty-nine thousand, five hundred thirty-seven".