13864340249 has 4 divisors (see below), whose sum is σ = 13901510436. Its totient is φ = 13827170064.

The previous prime is 13864340233. The next prime is 13864340257. The reversal of 13864340249 is 94204346831.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94204346831 = 7 ⋅13457763833.

It can be written as a sum of positive squares in 2 ways, for example, as 10167092224 + 3697248025 = 100832^2 + 60805^2 .

It is a cyclic number.

It is not a de Polignac number, because 13864340249 - 2⁴ = 13864340233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13864340549) 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, 18584534 + ... + 18585279.

It is an arithmetic number, because the mean of its divisors is an integer number (3475377609).

Almost surely, 2^13864340249 is an apocalyptic number.

It is an amenable number.

13864340249 is a deficient number, since it is larger than the sum of its proper divisors (37170187).

13864340249 is an equidigital number, since it uses as much as digits as its factorization.

13864340249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37170186.

The product of its (nonzero) digits is 497664, while the sum is 44.

The spelling of 13864340249 in words is "thirteen billion, eight hundred sixty-four million, three hundred forty thousand, two hundred forty-nine".