129435393 has 4 divisors (see below), whose sum is σ = 172580528. Its totient is φ = 86290260.

The previous prime is 129435379. The next prime is 129435403. The reversal of 129435393 is 393534921.

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 not a de Polignac number, because 129435393 - 2⁴ = 129435377 is a prime.

It is a super-2 number, since 2×129435393² = 33507041922128898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129439393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21572563 + ... + 21572568.

It is an arithmetic number, because the mean of its divisors is an integer number (43145132).

Almost surely, 2^129435393 is an apocalyptic number.

It is an amenable number.

129435393 is a deficient number, since it is larger than the sum of its proper divisors (43145135).

129435393 is an equidigital number, since it uses as much as digits as its factorization.

129435393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43145134.

The product of its digits is 87480, while the sum is 39.

The square root of 129435393 is about 11376.9676539929. The cubic root of 129435393 is about 505.8452569881.

It can be divided in two parts, 12943 and 5393, that added together give a triangular number (18336 = T₁₉₁).

The spelling of 129435393 in words is "one hundred twenty-nine million, four hundred thirty-five thousand, three hundred ninety-three".