13145949217 has 4 divisors (see below), whose sum is σ = 13146493360. Its totient is φ = 13145405076.

The previous prime is 13145949211. The next prime is 13145949233. The reversal of 13145949217 is 71294954131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13145949217 - 2¹¹ = 13145947169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13145949211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234063 + ... + 284740.

It is an arithmetic number, because the mean of its divisors is an integer number (3286623340).

Almost surely, 2^13145949217 is an apocalyptic number.

It is an amenable number.

13145949217 is a deficient number, since it is larger than the sum of its proper divisors (544143).

13145949217 is an equidigital number, since it uses as much as digits as its factorization.

13145949217 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544142.

The product of its digits is 272160, while the sum is 46.

The spelling of 13145949217 in words is "thirteen billion, one hundred forty-five million, nine hundred forty-nine thousand, two hundred seventeen".