129391473 has 8 divisors (see below), whose sum is σ = 172908000. Its totient is φ = 86067968.

The previous prime is 129391469. The next prime is 129391477. The reversal of 129391473 is 374193921.

It is an interprime number because it is at equal distance from previous prime (129391469) and next prime (129391477).

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

It is a cyclic number.

It is not a de Polignac number, because 129391473 - 2² = 129391469 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129391477) 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, 46683 + ... + 49376.

It is an arithmetic number, because the mean of its divisors is an integer number (21613500).

Almost surely, 2^129391473 is an apocalyptic number.

It is an amenable number.

129391473 is a deficient number, since it is larger than the sum of its proper divisors (43516527).

129391473 is an equidigital number, since it uses as much as digits as its factorization.

129391473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96511.

The product of its digits is 40824, while the sum is 39.

The square root of 129391473 is about 11375.0372746642. The cubic root of 129391473 is about 505.7880360675.

The spelling of 129391473 in words is "one hundred twenty-nine million, three hundred ninety-one thousand, four hundred seventy-three".