133740509 has 8 divisors (see below), whose sum is σ = 155128128. Its totient is φ = 112923360.

The previous prime is 133740461. The next prime is 133740511. The reversal of 133740509 is 905047331.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 133740509 - 2¹² = 133736413 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 (133740569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142112 + ... + 143049.

It is an arithmetic number, because the mean of its divisors is an integer number (19391016).

Almost surely, 2^133740509 is an apocalyptic number.

It is an amenable number.

133740509 is a deficient number, since it is larger than the sum of its proper divisors (21387619).

133740509 is an equidigital number, since it uses as much as digits as its factorization.

133740509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285235.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 133740509 is about 11564.6231672286. The cubic root of 133740509 is about 511.3924640487.

The spelling of 133740509 in words is "one hundred thirty-three million, seven hundred forty thousand, five hundred nine".