12813769 has 8 divisors (see below), whose sum is σ = 13014792. Its totient is φ = 12614400.

The previous prime is 12813761. The next prime is 12813791. The reversal of 12813769 is 96731821.

It can be written as a sum of positive squares in 4 ways, for example, as 5817744 + 6996025 = 2412^2 + 2645^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12813769 - 2³ = 12813761 is a prime.

It is a super-2 number, since 2×12813769² = 328385351970722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12813761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29377 + ... + 29809.

It is an arithmetic number, because the mean of its divisors is an integer number (1626849).

Almost surely, 2^12813769 is an apocalyptic number.

It is an amenable number.

12813769 is a deficient number, since it is larger than the sum of its proper divisors (201023).

12813769 is a wasteful number, since it uses less digits than its factorization.

12813769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 827.

The product of its digits is 18144, while the sum is 37.

The square root of 12813769 is about 3579.6325230392. The cubic root of 12813769 is about 234.0052656667.

It can be divided in two parts, 1281 and 3769, that added together give a triangular number (5050 = T₁₀₀).

The spelling of 12813769 in words is "twelve million, eight hundred thirteen thousand, seven hundred sixty-nine".