129764219 has 4 divisors (see below), whose sum is σ = 139746096. Its totient is φ = 119782344.

The previous prime is 129764203. The next prime is 129764269. The reversal of 129764219 is 912467921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 912467921 = 443 ⋅2059747.

It is a cyclic number.

It is not a de Polignac number, because 129764219 - 2⁴ = 129764203 is a prime.

It is a super-2 number, since 2×129764219² = 33677505065359922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129764269) 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, 4990919 + ... + 4990944.

It is an arithmetic number, because the mean of its divisors is an integer number (34936524).

Almost surely, 2^129764219 is an apocalyptic number.

129764219 is a deficient number, since it is larger than the sum of its proper divisors (9981877).

129764219 is an equidigital number, since it uses as much as digits as its factorization.

129764219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9981876.

The product of its digits is 54432, while the sum is 41.

The square root of 129764219 is about 11391.4098776227. The cubic root of 129764219 is about 506.2732553662.

The spelling of 129764219 in words is "one hundred twenty-nine million, seven hundred sixty-four thousand, two hundred nineteen".