13198765 has 8 divisors (see below), whose sum is σ = 16055928. Its totient is φ = 10414080.

The previous prime is 13198763. The next prime is 13198769. The reversal of 13198765 is 56789131.

It can be written as a sum of positive squares in 4 ways, for example, as 3200521 + 9998244 = 1789^2 + 3162^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13198765 - 2¹ = 13198763 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13198763) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17716 + ... + 18445.

It is an arithmetic number, because the mean of its divisors is an integer number (2006991).

Almost surely, 2^13198765 is an apocalyptic number.

It is an amenable number.

13198765 is a deficient number, since it is larger than the sum of its proper divisors (2857163).

13198765 is an equidigital number, since it uses as much as digits as its factorization.

13198765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36239.

The product of its digits is 45360, while the sum is 40.

The square root of 13198765 is about 3633.0104596601. The cubic root of 13198765 is about 236.3257793727.

The spelling of 13198765 in words is "thirteen million, one hundred ninety-eight thousand, seven hundred sixty-five".