133955009 has 4 divisors (see below), whose sum is σ = 136482516. Its totient is φ = 131427504.

The previous prime is 133954981. The next prime is 133955033. The reversal of 133955009 is 900559331.

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

It can be written as a sum of positive squares in 2 ways, for example, as 68425984 + 65529025 = 8272^2 + 8095^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-133955009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 133955009.

It is not an unprimeable number, because it can be changed into a prime (133985009) 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, 1263674 + ... + 1263779.

It is an arithmetic number, because the mean of its divisors is an integer number (34120629).

Almost surely, 2^133955009 is an apocalyptic number.

It is an amenable number.

133955009 is a deficient number, since it is larger than the sum of its proper divisors (2527507).

133955009 is an equidigital number, since it uses as much as digits as its factorization.

133955009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2527506.

The product of its (nonzero) digits is 18225, while the sum is 35.

The square root of 133955009 is about 11573.8934244272. The cubic root of 133955009 is about 511.6657173121.

The spelling of 133955009 in words is "one hundred thirty-three million, nine hundred fifty-five thousand, nine".