1343686189 has 2 divisors, whose sum is σ = 1343686190. Its totient is φ = 1343686188.

The previous prime is 1343686163. The next prime is 1343686193. The reversal of 1343686189 is 9816863431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 969263689 + 374422500 = 31133^2 + 19350^2 .

It is an emirp because it is prime and its reverse (9816863431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1343686189 - 2¹³ = 1343677997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1343686159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671843094 + 671843095.

It is an arithmetic number, because the mean of its divisors is an integer number (671843095).

Almost surely, 2^1343686189 is an apocalyptic number.

It is an amenable number.

1343686189 is a deficient number, since it is larger than the sum of its proper divisors (1).

1343686189 is an equidigital number, since it uses as much as digits as its factorization.

1343686189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 49.

The square root of 1343686189 is about 36656.3253613889. The cubic root of 1343686189 is about 1103.4837729188.

The spelling of 1343686189 in words is "one billion, three hundred forty-three million, six hundred eighty-six thousand, one hundred eighty-nine".