12938380009 has 9 divisors (see below), whose sum is σ = 13746285111. Its totient is φ = 12175478880.

The previous prime is 12938379997. The next prime is 12938380027. The reversal of 12938380009 is 90008383921.

It is a happy number.

The square root of 12938380009 is 113747.

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

It can be written as a sum of positive squares in only one way, i.e., 10073133225 + 2865246784 = 100365^2 + 53528^2 .

It is not a de Polignac number, because 12938380009 - 2⁵ = 12938379977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12938380079) 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, 1930354 + ... + 1937044.

Almost surely, 2^12938380009 is an apocalyptic number.

12938380009 is the 113747-th square number.

12938380009 is the 56874-th centered octagonal number.

It is an amenable number.

12938380009 is a deficient number, since it is larger than the sum of its proper divisors (807905102).

12938380009 is an frugal number, since it uses more digits than its factorization.

12938380009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13416 (or 6708 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 12938380009 in words is "twelve billion, nine hundred thirty-eight million, three hundred eighty thousand, nine".