133072805 has 4 divisors (see below), whose sum is σ = 159687372. Its totient is φ = 106458240.

The previous prime is 133072783. The next prime is 133072817. The reversal of 133072805 is 508270331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 508270331 = 1303 ⋅390077.

It can be written as a sum of positive squares in 2 ways, for example, as 89605156 + 43467649 = 9466^2 + 6593^2 .

It is not a de Polignac number, because 133072805 - 2¹⁰ = 133071781 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13307276 + ... + 13307285.

It is an arithmetic number, because the mean of its divisors is an integer number (39921843).

Almost surely, 2^133072805 is an apocalyptic number.

It is an amenable number.

133072805 is a deficient number, since it is larger than the sum of its proper divisors (26614567).

133072805 is an equidigital number, since it uses as much as digits as its factorization.

133072805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26614566.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 133072805 is about 11535.7186598842. The cubic root of 133072805 is about 510.5399957728.

The spelling of 133072805 in words is "one hundred thirty-three million, seventy-two thousand, eight hundred five".