13867397249 has 2 divisors, whose sum is σ = 13867397250. Its totient is φ = 13867397248.

The previous prime is 13867397231. The next prime is 13867397287. The reversal of 13867397249 is 94279376831.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12152857600 + 1714539649 = 110240^2 + 41407^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13867397249 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (13867397449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6933698624 + 6933698625.

It is an arithmetic number, because the mean of its divisors is an integer number (6933698625).

Almost surely, 2^13867397249 is an apocalyptic number.

It is an amenable number.

13867397249 is a deficient number, since it is larger than the sum of its proper divisors (1).

13867397249 is an equidigital number, since it uses as much as digits as its factorization.

13867397249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13716864, while the sum is 59.

The spelling of 13867397249 in words is "thirteen billion, eight hundred sixty-seven million, three hundred ninety-seven thousand, two hundred forty-nine".