129667 has 4 divisors (see below), whose sum is σ = 130816. Its totient is φ = 128520.

The previous prime is 129643. The next prime is 129671. The reversal of 129667 is 766921.

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 129667 - 2⁷ = 129539 is a prime.

It is a Duffinian number.

129667 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (129607) 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, 384 + ... + 637.

It is an arithmetic number, because the mean of its divisors is an integer number (32704).

2¹²⁹⁶⁶⁷ is an apocalyptic number.

129667 is a deficient number, since it is larger than the sum of its proper divisors (1149).

129667 is a wasteful number, since it uses less digits than its factorization.

129667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1148.

The product of its digits is 4536, while the sum is 31.

The square root of 129667 is about 360.0930435318. The cubic root of 129667 is about 50.6146790930.

The spelling of 129667 in words is "one hundred twenty-nine thousand, six hundred sixty-seven".