13108647049 has 3 divisors (see below), whose sum is σ = 13108761543. Its totient is φ = 13108532556.

The previous prime is 13108646989. The next prime is 13108647091. The reversal of 13108647049 is 94074680131.

The square root of 13108647049 is 114493.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 1985148025 + 11123499024 = 44555^2 + 105468^2 .

It is not a de Polignac number, because 13108647049 - 2⁷ = 13108646921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13108646996 and 13108647014.

It is not an unprimeable number, because it can be changed into a prime (13108647949) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 57247 + ... + 171739.

It is an arithmetic number, because the mean of its divisors is an integer number (4369587181).

Almost surely, 2^13108647049 is an apocalyptic number.

13108647049 is the 114493-rd square number.

13108647049 is the 57247-th centered octagonal number.

It is an amenable number.

13108647049 is a deficient number, since it is larger than the sum of its proper divisors (114494).

13108647049 is an frugal number, since it uses more digits than its factorization.

13108647049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228986 (or 114493 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The spelling of 13108647049 in words is "thirteen billion, one hundred eight million, six hundred forty-seven thousand, forty-nine".