13319228749 has 2 divisors, whose sum is σ = 13319228750. Its totient is φ = 13319228748.

The previous prime is 13319228743. The next prime is 13319228827. The reversal of 13319228749 is 94782291331.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12475326249 + 843902500 = 111693^2 + 29050^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13319228749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13319228743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6659614374 + 6659614375.

It is an arithmetic number, because the mean of its divisors is an integer number (6659614375).

Almost surely, 2^13319228749 is an apocalyptic number.

It is an amenable number.

13319228749 is a deficient number, since it is larger than the sum of its proper divisors (1).

13319228749 is an equidigital number, since it uses as much as digits as its factorization.

13319228749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 49.

The spelling of 13319228749 in words is "thirteen billion, three hundred nineteen million, two hundred twenty-eight thousand, seven hundred forty-nine".