13247319409 has 9 divisors (see below), whose sum is σ = 13342490553. Its totient is φ = 13152824772.

The previous prime is 13247319347. The next prime is 13247319427. The reversal of 13247319409 is 90491374231.

The square root of 13247319409 is 115097.

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

It is not a de Polignac number, because 13247319409 - 2¹⁵ = 13247286641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13247319109) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 20602042 + ... + 20602684.

Almost surely, 2^13247319409 is an apocalyptic number.

13247319409 is the 115097-th square number.

13247319409 is the 57549-th centered octagonal number.

It is an amenable number.

13247319409 is a deficient number, since it is larger than the sum of its proper divisors (95171144).

13247319409 is an frugal number, since it uses more digits than its factorization.

13247319409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1644 (or 822 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 43.

The spelling of 13247319409 in words is "thirteen billion, two hundred forty-seven million, three hundred nineteen thousand, four hundred nine".