129842913 has 4 divisors (see below), whose sum is σ = 173123888. Its totient is φ = 86561940.

The previous prime is 129842891. The next prime is 129842917. The reversal of 129842913 is 319248921.

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 129842913 - 2¹³ = 129834721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129842917) 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, 21640483 + ... + 21640488.

It is an arithmetic number, because the mean of its divisors is an integer number (43280972).

Almost surely, 2^129842913 is an apocalyptic number.

It is an amenable number.

129842913 is a deficient number, since it is larger than the sum of its proper divisors (43280975).

129842913 is an equidigital number, since it uses as much as digits as its factorization.

129842913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43280974.

The product of its digits is 31104, while the sum is 39.

The square root of 129842913 is about 11394.8634480629. The cubic root of 129842913 is about 506.3755758593.

The spelling of 129842913 in words is "one hundred twenty-nine million, eight hundred forty-two thousand, nine hundred thirteen".