133863 has 4 divisors (see below), whose sum is σ = 178488. Its totient is φ = 89240.

The previous prime is 133853. The next prime is 133873. The reversal of 133863 is 368331.

133863 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 368331 = 3 ⋅122777.

It is an interprime number because it is at equal distance from previous prime (133853) and next prime (133873).

It is a cyclic number.

It is not a de Polignac number, because 133863 - 2⁵ = 133831 is a prime.

It is an Ulam number.

It is a D-number.

It is a plaindrome in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133813) 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, 22308 + ... + 22313.

It is an arithmetic number, because the mean of its divisors is an integer number (44622).

2¹³³⁸⁶³ is an apocalyptic number.

133863 is a deficient number, since it is larger than the sum of its proper divisors (44625).

133863 is an equidigital number, since it uses as much as digits as its factorization.

133863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44624.

The product of its digits is 1296, while the sum is 24.

The square root of 133863 is about 365.8729287608. The cubic root of 133863 is about 51.1548542065.

The spelling of 133863 in words is "one hundred thirty-three thousand, eight hundred sixty-three".