129791409 has 8 divisors (see below), whose sum is σ = 188787552. Its totient is φ = 78661440.

The previous prime is 129791407. The next prime is 129791411. The reversal of 129791409 is 904197921.

It is an interprime number because it is at equal distance from previous prime (129791407) and next prime (129791411).

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

It is not a de Polignac number, because 129791409 - 2¹ = 129791407 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129791407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1966504 + ... + 1966569.

It is an arithmetic number, because the mean of its divisors is an integer number (23598444).

Almost surely, 2^129791409 is an apocalyptic number.

It is an amenable number.

129791409 is a deficient number, since it is larger than the sum of its proper divisors (58996143).

129791409 is a wasteful number, since it uses less digits than its factorization.

129791409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3933087.

The product of its (nonzero) digits is 40824, while the sum is 42.

The square root of 129791409 is about 11392.6032582549. The cubic root of 129791409 is about 506.3086133629.

The spelling of 129791409 in words is "one hundred twenty-nine million, seven hundred ninety-one thousand, four hundred nine".