12809354 has 4 divisors (see below), whose sum is σ = 19214034. Its totient is φ = 6404676.

The previous prime is 12809351. The next prime is 12809359. The reversal of 12809354 is 45390821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 45390821 = 7 ⋅6484403.

It can be written as a sum of positive squares in only one way, i.e., 6880129 + 5929225 = 2623^2 + 2435^2 .

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 12809354.

It is not an unprimeable number, because it can be changed into a prime (12809351) 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 as a sum of consecutive naturals, namely, 3202337 + ... + 3202340.

Almost surely, 2^12809354 is an apocalyptic number.

12809354 is a deficient number, since it is larger than the sum of its proper divisors (6404680).

12809354 is an equidigital number, since it uses as much as digits as its factorization.

12809354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6404679.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 12809354 is about 3579.0157864977. The cubic root of 12809354 is about 233.9783869779.

The spelling of 12809354 in words is "twelve million, eight hundred nine thousand, three hundred fifty-four".