129119997 has 8 divisors (see below), whose sum is σ = 172553920. Its totient is φ = 85883040.

The previous prime is 129119959. The next prime is 129120001. The reversal of 129119997 is 799911921.

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

It is not a de Polignac number, because 129119997 - 2⁶ = 129119933 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 (129119917) 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, 47704 + ... + 50337.

It is an arithmetic number, because the mean of its divisors is an integer number (21569240).

Almost surely, 2^129119997 is an apocalyptic number.

It is an amenable number.

129119997 is a deficient number, since it is larger than the sum of its proper divisors (43433923).

129119997 is an equidigital number, since it uses as much as digits as its factorization.

129119997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98483.

The product of its digits is 91854, while the sum is 48.

The square root of 129119997 is about 11363.0980370672. The cubic root of 129119997 is about 505.4340574236.

The spelling of 129119997 in words is "one hundred twenty-nine million, one hundred nineteen thousand, nine hundred ninety-seven".