13196857 has 4 divisors (see below), whose sum is σ = 13217140. Its totient is φ = 13176576.

The previous prime is 13196839. The next prime is 13196873. The reversal of 13196857 is 75869131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75869131 = 13 ⋅5836087.

It can be written as a sum of positive squares in 2 ways, for example, as 10137856 + 3059001 = 3184^2 + 1749^2 .

It is a cyclic number.

It is not a de Polignac number, because 13196857 - 2²³ = 4808249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13196837) 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 3 ways as a sum of consecutive naturals, for example, 9132 + ... + 10477.

It is an arithmetic number, because the mean of its divisors is an integer number (3304285).

Almost surely, 2^13196857 is an apocalyptic number.

It is an amenable number.

13196857 is a deficient number, since it is larger than the sum of its proper divisors (20283).

13196857 is an equidigital number, since it uses as much as digits as its factorization.

13196857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20282.

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

The square root of 13196857 is about 3632.7478580270. The cubic root of 13196857 is about 236.3143911528.

The spelling of 13196857 in words is "thirteen million, one hundred ninety-six thousand, eight hundred fifty-seven".