129697449 has 8 divisors (see below), whose sum is σ = 197634240. Its totient is φ = 74112816.

The previous prime is 129697427. The next prime is 129697453. The reversal of 129697449 is 944796921.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 129697449 - 2⁹ = 129696937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129697499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3088014 + ... + 3088055.

It is an arithmetic number, because the mean of its divisors is an integer number (24704280).

Almost surely, 2^129697449 is an apocalyptic number.

It is an amenable number.

129697449 is a deficient number, since it is larger than the sum of its proper divisors (67936791).

129697449 is an equidigital number, since it uses as much as digits as its factorization.

129697449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6176079.

The product of its digits is 979776, while the sum is 51.

The square root of 129697449 is about 11388.4787834021. The cubic root of 129697449 is about 506.1864063999.

The spelling of 129697449 in words is "one hundred twenty-nine million, six hundred ninety-seven thousand, four hundred forty-nine".