129184069 has 4 divisors (see below), whose sum is σ = 147638944. Its totient is φ = 110729196.

The previous prime is 129184051. The next prime is 129184073. The reversal of 129184069 is 960481921.

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.

It is a cyclic number.

It is not a de Polignac number, because 129184069 - 2¹⁹ = 128659781 is a prime.

It is a super-2 number, since 2×129184069² = 33377047366793522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129184049) 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, 9227427 + ... + 9227440.

It is an arithmetic number, because the mean of its divisors is an integer number (36909736).

Almost surely, 2^129184069 is an apocalyptic number.

It is an amenable number.

129184069 is a deficient number, since it is larger than the sum of its proper divisors (18454875).

129184069 is an equidigital number, since it uses as much as digits as its factorization.

129184069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18454874.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 129184069 is about 11365.9169889631. The cubic root of 129184069 is about 505.5176458597.

The spelling of 129184069 in words is "one hundred twenty-nine million, one hundred eighty-four thousand, sixty-nine".