12809019 has 8 divisors (see below), whose sum is σ = 17133840. Its totient is φ = 8511776.

The previous prime is 12809009. The next prime is 12809023. The reversal of 12809019 is 91090821.

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 12809019 - 2⁴ = 12809003 is a prime.

It is a super-2 number, since 2×12809019² = 328141935484722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (12809009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5784 + ... + 7685.

It is an arithmetic number, because the mean of its divisors is an integer number (2141730).

Almost surely, 2^12809019 is an apocalyptic number.

12809019 is a deficient number, since it is larger than the sum of its proper divisors (4324821).

12809019 is a wasteful number, since it uses less digits than its factorization.

12809019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13789.

The product of its (nonzero) digits is 1296, while the sum is 30.

The square root of 12809019 is about 3578.9689856158. The cubic root of 12809019 is about 233.9763472330.

The spelling of 12809019 in words is "twelve million, eight hundred nine thousand, nineteen".