12764909 has 8 divisors (see below), whose sum is σ = 13656888. Its totient is φ = 11888640.

The previous prime is 12764887. The next prime is 12764911. The reversal of 12764909 is 90946721.

It can be written as a sum of positive squares in 4 ways, for example, as 1562500 + 11202409 = 1250^2 + 3347^2 .

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 12764909 - 2¹⁶ = 12699373 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 (12764209) 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 7 ways as a sum of consecutive naturals, for example, 2222 + ... + 5519.

It is an arithmetic number, because the mean of its divisors is an integer number (1707111).

Almost surely, 2^12764909 is an apocalyptic number.

It is an amenable number.

12764909 is a deficient number, since it is larger than the sum of its proper divisors (891979).

12764909 is an equidigital number, since it uses as much as digits as its factorization.

12764909 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7855.

The product of its (nonzero) digits is 27216, while the sum is 38.

The square root of 12764909 is about 3572.8012819075. The cubic root of 12764909 is about 233.7074594437.

The spelling of 12764909 in words is "twelve million, seven hundred sixty-four thousand, nine hundred nine".