12619809 has 6 divisors (see below), whose sum is σ = 18228626. Its totient is φ = 8413200.

The previous prime is 12619807. The next prime is 12619813. The reversal of 12619809 is 90891621.

It can be written as a sum of positive squares in only one way, i.e., 12531600 + 88209 = 3540^2 + 297^2 .

It is not a de Polignac number, because 12619809 - 2¹ = 12619807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12619807) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 701092 + ... + 701109.

Almost surely, 2^12619809 is an apocalyptic number.

It is an amenable number.

12619809 is a deficient number, since it is larger than the sum of its proper divisors (5608817).

12619809 is a wasteful number, since it uses less digits than its factorization.

12619809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1402207 (or 1402204 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 36.

The square root of 12619809 is about 3552.4370508146. The cubic root of 12619809 is about 232.8185574359.

The spelling of 12619809 in words is "twelve million, six hundred nineteen thousand, eight hundred nine".