133509705 has 16 divisors (see below), whose sum is σ = 244132224. Its totient is φ = 61032960.

The previous prime is 133509689. The next prime is 133509709. The reversal of 133509705 is 507905331.

It is not a de Polignac number, because 133509705 - 2⁴ = 133509689 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133509709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 635656 + ... + 635865.

It is an arithmetic number, because the mean of its divisors is an integer number (15258264).

Almost surely, 2^133509705 is an apocalyptic number.

133509705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

133509705 is a deficient number, since it is larger than the sum of its proper divisors (110622519).

133509705 is a wasteful number, since it uses less digits than its factorization.

133509705 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1271536.

The product of its (nonzero) digits is 14175, while the sum is 33.

The square root of 133509705 is about 11554.6399770828. The cubic root of 133509705 is about 511.0981144651.

The spelling of 133509705 in words is "one hundred thirty-three million, five hundred nine thousand, seven hundred five".