129668493 has 16 divisors (see below), whose sum is σ = 177863616. Its totient is φ = 83994240.

The previous prime is 129668477. The next prime is 129668519. The reversal of 129668493 is 394866921.

It is not a de Polignac number, because 129668493 - 2⁴ = 129668477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129668423) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10921 + ... + 19457.

It is an arithmetic number, because the mean of its divisors is an integer number (11116476).

Almost surely, 2^129668493 is an apocalyptic number.

It is an amenable number.

129668493 is a deficient number, since it is larger than the sum of its proper divisors (48195123).

129668493 is an equidigital number, since it uses as much as digits as its factorization.

129668493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8684.

The product of its digits is 559872, while the sum is 48.

The square root of 129668493 is about 11387.2074276356. The cubic root of 129668493 is about 506.1487335323.

The spelling of 129668493 in words is "one hundred twenty-nine million, six hundred sixty-eight thousand, four hundred ninety-three".