129697 has 4 divisors (see below), whose sum is σ = 135360. Its totient is φ = 124036.

The previous prime is 129671. The next prime is 129707. The reversal of 129697 is 796921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 129697 - 2¹¹ = 127649 is a prime.

It is an Ulam number.

It is a Duffinian 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, 2797 + ... + 2842.

It is an arithmetic number, because the mean of its divisors is an integer number (33840).

2¹²⁹⁶⁹⁷ is an apocalyptic number.

129697 is the 193-rd centered heptagonal number.

It is an amenable number.

129697 is a deficient number, since it is larger than the sum of its proper divisors (5663).

129697 is an equidigital number, since it uses as much as digits as its factorization.

129697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5662.

The product of its digits is 6804, while the sum is 34.

The square root of 129697 is about 360.1346970232. The cubic root of 129697 is about 50.6185822277.

The spelling of 129697 in words is "one hundred twenty-nine thousand, six hundred ninety-seven".