129829494209 has 4 divisors (see below), whose sum is σ = 132848784816. Its totient is φ = 126810203604.

The previous prime is 129829494131. The next prime is 129829494211. The reversal of 129829494209 is 902494928921.

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, and also an emirpimes, since its reverse is a distinct semiprime: 902494928921 = 59 ⋅15296524219.

It is a cyclic number.

It is not a de Polignac number, because 129829494209 - 2³² = 125534526913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129829494709) 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, 1509645239 + ... + 1509645324.

It is an arithmetic number, because the mean of its divisors is an integer number (33212196204).

Almost surely, 2^129829494209 is an apocalyptic number.

It is an amenable number.

129829494209 is a deficient number, since it is larger than the sum of its proper divisors (3019290607).

129829494209 is an equidigital number, since it uses as much as digits as its factorization.

129829494209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3019290606.

The product of its (nonzero) digits is 6718464, while the sum is 59.

The spelling of 129829494209 in words is "one hundred twenty-nine billion, eight hundred twenty-nine million, four hundred ninety-four thousand, two hundred nine".