133661883 has 4 divisors (see below), whose sum is σ = 178215848. Its totient is φ = 89107920.

The previous prime is 133661881. The next prime is 133661887. The reversal of 133661883 is 388166331.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 133661883 - 2¹ = 133661881 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133661881) 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, 22276978 + ... + 22276983.

It is an arithmetic number, because the mean of its divisors is an integer number (44553962).

Almost surely, 2^133661883 is an apocalyptic number.

133661883 is a deficient number, since it is larger than the sum of its proper divisors (44553965).

133661883 is an equidigital number, since it uses as much as digits as its factorization.

133661883 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44553964.

The product of its digits is 62208, while the sum is 39.

The square root of 133661883 is about 11561.2232484283. The cubic root of 133661883 is about 511.2922285845.

The spelling of 133661883 in words is "one hundred thirty-three million, six hundred sixty-one thousand, eight hundred eighty-three".