13809380149 has 4 divisors (see below), whose sum is σ = 13936071820. Its totient is φ = 13682688480.

The previous prime is 13809380111. The next prime is 13809380171. The reversal of 13809380149 is 94108390831.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5647522500 + 8161857649 = 75150^2 + 90343^2 .

It is a cyclic number.

It is not a de Polignac number, because 13809380149 - 2¹⁹ = 13808855861 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13809380099 and 13809380108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13809389149) 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, 63345672 + ... + 63345889.

It is an arithmetic number, because the mean of its divisors is an integer number (3484017955).

Almost surely, 2^13809380149 is an apocalyptic number.

It is an amenable number.

13809380149 is a deficient number, since it is larger than the sum of its proper divisors (126691671).

13809380149 is a wasteful number, since it uses less digits than its factorization.

13809380149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126691670.

The product of its (nonzero) digits is 186624, while the sum is 46.

The spelling of 13809380149 in words is "thirteen billion, eight hundred nine million, three hundred eighty thousand, one hundred forty-nine".