13869532949 has 2 divisors, whose sum is σ = 13869532950. Its totient is φ = 13869532948.

The previous prime is 13869532927. The next prime is 13869532951. The reversal of 13869532949 is 94923596831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13547330449 + 322202500 = 116393^2 + 17950^2 .

It is a cyclic number.

It is not a de Polignac number, because 13869532949 - 2⁸ = 13869532693 is a prime.

Together with 13869532951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13869532969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6934766474 + 6934766475.

It is an arithmetic number, because the mean of its divisors is an integer number (6934766475).

Almost surely, 2^13869532949 is an apocalyptic number.

It is an amenable number.

13869532949 is a deficient number, since it is larger than the sum of its proper divisors (1).

13869532949 is an equidigital number, since it uses as much as digits as its factorization.

13869532949 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12597120, while the sum is 59.

The spelling of 13869532949 in words is "thirteen billion, eight hundred sixty-nine million, five hundred thirty-two thousand, nine hundred forty-nine".