12763391 has 4 divisors (see below), whose sum is σ = 12813312. Its totient is φ = 12713472.

The previous prime is 12763381. The next prime is 12763403. The reversal of 12763391 is 19336721.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19336721 = 23 ⋅840727.

It is a cyclic number.

It is not a de Polignac number, because 12763391 - 2⁶ = 12763327 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 (12763381) 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, 24575 + ... + 25088.

It is an arithmetic number, because the mean of its divisors is an integer number (3203328).

Almost surely, 2^12763391 is an apocalyptic number.

12763391 is a deficient number, since it is larger than the sum of its proper divisors (49921).

12763391 is an equidigital number, since it uses as much as digits as its factorization.

12763391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49920.

The product of its digits is 6804, while the sum is 32.

The square root of 12763391 is about 3572.5888372439. The cubic root of 12763391 is about 233.6981949309.

The spelling of 12763391 in words is "twelve million, seven hundred sixty-three thousand, three hundred ninety-one".