13199765 has 4 divisors (see below), whose sum is σ = 15839724. Its totient is φ = 10559808.

The previous prime is 13199749. The next prime is 13199779. The reversal of 13199765 is 56799131.

13199765 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, and also an emirpimes, since its reverse is a distinct semiprime: 56799131 = 107 ⋅530833.

It can be written as a sum of positive squares in 2 ways, for example, as 8898289 + 4301476 = 2983^2 + 2074^2 .

It is a cyclic number.

It is not a de Polignac number, because 13199765 - 2⁴ = 13199749 is a prime.

It is a Duffinian number.

It is a congruent 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, 1319972 + ... + 1319981.

It is an arithmetic number, because the mean of its divisors is an integer number (3959931).

Almost surely, 2^13199765 is an apocalyptic number.

It is an amenable number.

13199765 is a deficient number, since it is larger than the sum of its proper divisors (2639959).

13199765 is an equidigital number, since it uses as much as digits as its factorization.

13199765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2639958.

The product of its digits is 51030, while the sum is 41.

The square root of 13199765 is about 3633.1480839624. The cubic root of 13199765 is about 236.3317476031.

The spelling of 13199765 in words is "thirteen million, one hundred ninety-nine thousand, seven hundred sixty-five".