129863 has 4 divisors (see below), whose sum is σ = 137520. Its totient is φ = 122208.

The previous prime is 129853. The next prime is 129887. The reversal of 129863 is 368921.

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

It is a cyclic number.

It is not a de Polignac number, because 129863 - 2⁸ = 129607 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129803) 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, 3803 + ... + 3836.

It is an arithmetic number, because the mean of its divisors is an integer number (34380).

2¹²⁹⁸⁶³ is an apocalyptic number.

129863 is a deficient number, since it is larger than the sum of its proper divisors (7657).

129863 is an equidigital number, since it uses as much as digits as its factorization.

129863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7656.

The product of its digits is 2592, while the sum is 29.

The square root of 129863 is about 360.3650926491. The cubic root of 129863 is about 50.6401687005.

The spelling of 129863 in words is "one hundred twenty-nine thousand, eight hundred sixty-three".