133671803 has 4 divisors (see below), whose sum is σ = 133695648. Its totient is φ = 133647960.

The previous prime is 133671793. The next prime is 133671809. The reversal of 133671803 is 308176331.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 308176331 = 61 ⋅5052071.

It is a cyclic number.

It is not a de Polignac number, because 133671803 - 2⁶ = 133671739 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 133671803.

It is not an unprimeable number, because it can be changed into a prime (133671809) 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, 1598 + ... + 16428.

It is an arithmetic number, because the mean of its divisors is an integer number (33423912).

Almost surely, 2^133671803 is an apocalyptic number.

133671803 is a deficient number, since it is larger than the sum of its proper divisors (23845).

133671803 is an equidigital number, since it uses as much as digits as its factorization.

133671803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23844.

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 133671803 is about 11561.6522608146. The cubic root of 133671803 is about 511.3048771504.

The spelling of 133671803 in words is "one hundred thirty-three million, six hundred seventy-one thousand, eight hundred three".