12709819 has 4 divisors (see below), whose sum is σ = 12717544. Its totient is φ = 12702096.

The previous prime is 12709817. The next prime is 12709847. The reversal of 12709819 is 91890721.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a 4-Lehmer number, since φ(12709819) divides (12709819-1)⁴.

It is a cyclic number.

It is not a de Polignac number, because 12709819 - 2¹ = 12709817 is a prime.

It is a super-2 number, since 2×12709819² = 323078998025522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12709817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297 + ... + 5050.

It is an arithmetic number, because the mean of its divisors is an integer number (3179386).

Almost surely, 2^12709819 is an apocalyptic number.

12709819 is a deficient number, since it is larger than the sum of its proper divisors (7725).

12709819 is an equidigital number, since it uses as much as digits as its factorization.

12709819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7724.

The product of its (nonzero) digits is 9072, while the sum is 37.

The square root of 12709819 is about 3565.0833089845. The cubic root of 12709819 is about 233.3707679168.

The spelling of 12709819 in words is "twelve million, seven hundred nine thousand, eight hundred nineteen".