12708619409 has 2 divisors, whose sum is σ = 12708619410. Its totient is φ = 12708619408.

The previous prime is 12708619367. The next prime is 12708619439. The reversal of 12708619409 is 90491680721.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9120250000 + 3588369409 = 95500^2 + 59903^2 .

It is a cyclic number.

It is not a de Polignac number, because 12708619409 - 2¹² = 12708615313 is a prime.

It is not a weakly prime, because it can be changed into another prime (12708619439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6354309704 + 6354309705.

It is an arithmetic number, because the mean of its divisors is an integer number (6354309705).

Almost surely, 2^12708619409 is an apocalyptic number.

It is an amenable number.

12708619409 is a deficient number, since it is larger than the sum of its proper divisors (1).

12708619409 is an equidigital number, since it uses as much as digits as its factorization.

12708619409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 47.

The spelling of 12708619409 in words is "twelve billion, seven hundred eight million, six hundred nineteen thousand, four hundred nine".