129309011 has 4 divisors (see below), whose sum is σ = 139255872. Its totient is φ = 119362152.

The previous prime is 129308983. The next prime is 129309049. The reversal of 129309011 is 110903921.

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

It is not a de Polignac number, because 129309011 - 2¹⁰ = 129307987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129309071) 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, 4973411 + ... + 4973436.

It is an arithmetic number, because the mean of its divisors is an integer number (34813968).

Almost surely, 2^129309011 is an apocalyptic number.

129309011 is a deficient number, since it is larger than the sum of its proper divisors (9946861).

129309011 is an equidigital number, since it uses as much as digits as its factorization.

129309011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9946860.

The product of its (nonzero) digits is 486, while the sum is 26.

The square root of 129309011 is about 11371.4120055515. The cubic root of 129309011 is about 505.6805659344.

The spelling of 129309011 in words is "one hundred twenty-nine million, three hundred nine thousand, eleven".