1343645489 has 2 divisors, whose sum is σ = 1343645490. Its totient is φ = 1343645488.

The previous prime is 1343645449. The next prime is 1343645503. The reversal of 1343645489 is 9845463431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1153757089 + 189888400 = 33967^2 + 13780^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1343645489 is a prime.

It is a super-2 number, since 2×1343645489² = 3610766400220098242, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1343645449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671822744 + 671822745.

It is an arithmetic number, because the mean of its divisors is an integer number (671822745).

Almost surely, 2^1343645489 is an apocalyptic number.

It is an amenable number.

1343645489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1343645489 is an equidigital number, since it uses as much as digits as its factorization.

1343645489 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1244160, while the sum is 47.

The square root of 1343645489 is about 36655.7702006110. The cubic root of 1343645489 is about 1103.4726313682.

The spelling of 1343645489 in words is "one billion, three hundred forty-three million, six hundred forty-five thousand, four hundred eighty-nine".