11209939129 has 9 divisors (see below), whose sum is σ = 11282507173. Its totient is φ = 11137836892.

The previous prime is 11209939127. The next prime is 11209939189. The reversal of 11209939129 is 92193990211.

The square root of 11209939129 is 105877.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 11209939129 - 2¹ = 11209939127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11209939127) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 25304382 + ... + 25304824.

Almost surely, 2^11209939129 is an apocalyptic number.

11209939129 is the 105877-th square number.

11209939129 is the 52939-th centered octagonal number.

It is an amenable number.

11209939129 is a deficient number, since it is larger than the sum of its proper divisors (72568044).

11209939129 is an frugal number, since it uses more digits than its factorization.

11209939129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1364 (or 682 counting only the distinct ones).

The product of its (nonzero) digits is 78732, while the sum is 46.

The spelling of 11209939129 in words is "eleven billion, two hundred nine million, nine hundred thirty-nine thousand, one hundred twenty-nine".