13097785 has 4 divisors (see below), whose sum is σ = 15717348. Its totient is φ = 10478224.

The previous prime is 13097771. The next prime is 13097797. The reversal of 13097785 is 58779031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 58779031 = 2207 ⋅26633.

It can be written as a sum of positive squares in 2 ways, for example, as 6827769 + 6270016 = 2613^2 + 2504^2 .

It is a cyclic number.

It is not a de Polignac number, because 13097785 - 2⁵ = 13097753 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1309774 + ... + 1309783.

It is an arithmetic number, because the mean of its divisors is an integer number (3929337).

Almost surely, 2^13097785 is an apocalyptic number.

It is an amenable number.

13097785 is a deficient number, since it is larger than the sum of its proper divisors (2619563).

13097785 is an equidigital number, since it uses as much as digits as its factorization.

13097785 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2619562.

The product of its (nonzero) digits is 52920, while the sum is 40.

The square root of 13097785 is about 3619.0862106338. The cubic root of 13097785 is about 235.7215486852.

The spelling of 13097785 in words is "thirteen million, ninety-seven thousand, seven hundred eighty-five".