1343647813 has 2 divisors, whose sum is σ = 1343647814. Its totient is φ = 1343647812.

The previous prime is 1343647771. The next prime is 1343647817. The reversal of 1343647813 is 3187463431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 827540289 + 516107524 = 28767^2 + 22718^2 .

It is a cyclic number.

It is not a de Polignac number, because 1343647813 - 2²⁵ = 1310093381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1343647817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671823906 + 671823907.

It is an arithmetic number, because the mean of its divisors is an integer number (671823907).

Almost surely, 2^1343647813 is an apocalyptic number.

It is an amenable number.

1343647813 is a deficient number, since it is larger than the sum of its proper divisors (1).

1343647813 is an equidigital number, since it uses as much as digits as its factorization.

1343647813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 40.

The square root of 1343647813 is about 36655.8019009270. The cubic root of 1343647813 is about 1103.4732675650.

The spelling of 1343647813 in words is "one billion, three hundred forty-three million, six hundred forty-seven thousand, eight hundred thirteen".