133850821 has 8 divisors (see below), whose sum is σ = 145067384. Its totient is φ = 122765760.

The previous prime is 133850819. The next prime is 133850837. The reversal of 133850821 is 128058331.

It can be written as a sum of positive squares in 4 ways, for example, as 6477025 + 127373796 = 2545^2 + 11286^2 .

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

It is not a de Polignac number, because 133850821 - 2¹ = 133850819 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 (133850851) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 30750 + ... + 34831.

It is an arithmetic number, because the mean of its divisors is an integer number (18133423).

Almost surely, 2^133850821 is an apocalyptic number.

It is an amenable number.

133850821 is a deficient number, since it is larger than the sum of its proper divisors (11216563).

133850821 is a wasteful number, since it uses less digits than its factorization.

133850821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65751.

The product of its (nonzero) digits is 5760, while the sum is 31.

The square root of 133850821 is about 11569.3915570353. The cubic root of 133850821 is about 511.5330278487.

The spelling of 133850821 in words is "one hundred thirty-three million, eight hundred fifty thousand, eight hundred twenty-one".