133275905 has 8 divisors (see below), whose sum is σ = 182778432. Its totient is φ = 91389168.

The previous prime is 133275889. The next prime is 133275917. The reversal of 133275905 is 509572331.

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 133275905 - 2⁴ = 133275889 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35), and also a Moran number because the ratio is a prime number: 3807883 = 133275905 / (1 + 3 + 3 + 2 + 7 + 5 + 9 + 0 + 5).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1903907 + ... + 1903976.

It is an arithmetic number, because the mean of its divisors is an integer number (22847304).

Almost surely, 2^133275905 is an apocalyptic number.

It is an amenable number.

133275905 is a deficient number, since it is larger than the sum of its proper divisors (49502527).

133275905 is an equidigital number, since it uses as much as digits as its factorization.

133275905 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3807895.

The product of its (nonzero) digits is 28350, while the sum is 35.

The square root of 133275905 is about 11544.5183961913. The cubic root of 133275905 is about 510.7995979402.

The spelling of 133275905 in words is "one hundred thirty-three million, two hundred seventy-five thousand, nine hundred five".