13780013309 has 4 divisors (see below), whose sum is σ = 13809905340. Its totient is φ = 13750121280.

The previous prime is 13780013293. The next prime is 13780013327. The reversal of 13780013309 is 90331008731.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 90331008731 = 6151 ⋅14685581.

It can be written as a sum of positive squares in 2 ways, for example, as 2337432409 + 11442580900 = 48347^2 + 106970^2 .

It is a cyclic number.

It is not a de Polignac number, because 13780013309 - 2⁴ = 13780013293 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13780013209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14945324 + ... + 14946245.

It is an arithmetic number, because the mean of its divisors is an integer number (3452476335).

Almost surely, 2^13780013309 is an apocalyptic number.

It is an amenable number.

13780013309 is a deficient number, since it is larger than the sum of its proper divisors (29892031).

13780013309 is an equidigital number, since it uses as much as digits as its factorization.

13780013309 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29892030.

The product of its (nonzero) digits is 13608, while the sum is 35.

The spelling of 13780013309 in words is "thirteen billion, seven hundred eighty million, thirteen thousand, three hundred nine".