129219473 has 4 divisors (see below), whose sum is σ = 129458868. Its totient is φ = 128980080.

The previous prime is 129219469. The next prime is 129219479. The reversal of 129219473 is 374912921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16265089 + 112954384 = 4033^2 + 10628^2 .

It is a cyclic number.

It is not a de Polignac number, because 129219473 - 2² = 129219469 is a prime.

It is a super-3 number, since 3×129219473³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129219479) 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 3 ways as a sum of consecutive naturals, for example, 118886 + ... + 119967.

It is an arithmetic number, because the mean of its divisors is an integer number (32364717).

Almost surely, 2^129219473 is an apocalyptic number.

It is an amenable number.

129219473 is a deficient number, since it is larger than the sum of its proper divisors (239395).

129219473 is an equidigital number, since it uses as much as digits as its factorization.

129219473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239394.

The product of its digits is 27216, while the sum is 38.

The square root of 129219473 is about 11367.4743456935. The cubic root of 129219473 is about 505.5638221210.

The spelling of 129219473 in words is "one hundred twenty-nine million, two hundred nineteen thousand, four hundred seventy-three".