129424091 has 4 divisors (see below), whose sum is σ = 129455184. Its totient is φ = 129393000.

The previous prime is 129424081. The next prime is 129424103. The reversal of 129424091 is 190424921.

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

It is a cyclic number.

It is not a de Polignac number, because 129424091 - 2⁶ = 129424027 is a prime.

It is a super-3 number, since 3×129424091³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a nialpdrome in base 8.

It is not an unprimeable number, because it can be changed into a prime (129424051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8120 + ... + 18021.

It is an arithmetic number, because the mean of its divisors is an integer number (32363796).

Almost surely, 2^129424091 is an apocalyptic number.

129424091 is a deficient number, since it is larger than the sum of its proper divisors (31093).

129424091 is an equidigital number, since it uses as much as digits as its factorization.

129424091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31092.

The product of its (nonzero) digits is 5184, while the sum is 32.

The square root of 129424091 is about 11376.4709378612. The cubic root of 129424091 is about 505.8305334791.

The spelling of 129424091 in words is "one hundred twenty-nine million, four hundred twenty-four thousand, ninety-one".