133618893 has 16 divisors (see below), whose sum is σ = 182515200. Its totient is φ = 86923440.

The previous prime is 133618873. The next prime is 133618907. The reversal of 133618893 is 398816331.

It is not a de Polignac number, because 133618893 - 2¹⁸ = 133356749 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133618873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21888 + ... + 27318.

It is an arithmetic number, because the mean of its divisors is an integer number (11407200).

Almost surely, 2^133618893 is an apocalyptic number.

It is an amenable number.

133618893 is a deficient number, since it is larger than the sum of its proper divisors (48896307).

133618893 is a wasteful number, since it uses less digits than its factorization.

133618893 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5632.

The product of its digits is 93312, while the sum is 42.

The square root of 133618893 is about 11559.3638665802. The cubic root of 133618893 is about 511.2374066478.

The spelling of 133618893 in words is "one hundred thirty-three million, six hundred eighteen thousand, eight hundred ninety-three".