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13193764249 = 66119960309
BaseRepresentation
bin11000100100110100…
…01101110110011001
31021001111101200001011
430102122031312121
5204010100423444
610021112053521
7644645100661
oct142232156631
937044350034
1013193764249
1156605993a6
1226826942a1
1313235848c3
148d23a71a1
15523478734
hex31268dd99

13193764249 has 4 divisors (see below), whose sum is σ = 13213725220. Its totient is φ = 13173803280.

The previous prime is 13193764201. The next prime is 13193764253. The reversal of 13193764249 is 94246739131.

13193764249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 3841520400 + 9352243849 = 61980^2 + 96707^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-13193764249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13193764279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9979494 + ... + 9980815.

It is an arithmetic number, because the mean of its divisors is an integer number (3303431305).

Almost surely, 213193764249 is an apocalyptic number.

It is an amenable number.

13193764249 is a deficient number, since it is larger than the sum of its proper divisors (19960971).

13193764249 is an equidigital number, since it uses as much as digits as its factorization.

13193764249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19960970.

The product of its digits is 979776, while the sum is 49.

The spelling of 13193764249 in words is "thirteen billion, one hundred ninety-three million, seven hundred sixty-four thousand, two hundred forty-nine".

Divisors: 1 661 19960309 13193764249