133803811 has 8 divisors (see below), whose sum is σ = 140143104. Its totient is φ = 127508040.

The previous prime is 133803809. The next prime is 133803823. The reversal of 133803811 is 118308331.

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 133803811 - 2¹ = 133803809 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 133803811.

It is not an unprimeable number, because it can be changed into a prime (133803851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4501 + ... + 16966.

It is an arithmetic number, because the mean of its divisors is an integer number (17517888).

Almost surely, 2^133803811 is an apocalyptic number.

133803811 is a deficient number, since it is larger than the sum of its proper divisors (6339293).

133803811 is a wasteful number, since it uses less digits than its factorization.

133803811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21761.

The product of its (nonzero) digits is 1728, while the sum is 28.

The square root of 133803811 is about 11567.3597246736. The cubic root of 133803811 is about 511.4731353424.

The spelling of 133803811 in words is "one hundred thirty-three million, eight hundred three thousand, eight hundred eleven".