13206889649 has 2 divisors, whose sum is σ = 13206889650. Its totient is φ = 13206889648.

The previous prime is 13206889627. The next prime is 13206889651. The reversal of 13206889649 is 94698860231.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12691599649 + 515290000 = 112657^2 + 22700^2 .

It is a cyclic number.

It is not a de Polignac number, because 13206889649 - 2¹² = 13206885553 is a prime.

Together with 13206889651, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 13206889594 and 13206889603.

It is not a weakly prime, because it can be changed into another prime (13206889249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6603444824 + 6603444825.

It is an arithmetic number, because the mean of its divisors is an integer number (6603444825).

Almost surely, 2^13206889649 is an apocalyptic number.

It is an amenable number.

13206889649 is a deficient number, since it is larger than the sum of its proper divisors (1).

13206889649 is an equidigital number, since it uses as much as digits as its factorization.

13206889649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4478976, while the sum is 56.

The spelling of 13206889649 in words is "thirteen billion, two hundred six million, eight hundred eighty-nine thousand, six hundred forty-nine".