1343644217 has 2 divisors, whose sum is σ = 1343644218. Its totient is φ = 1343644216.

The previous prime is 1343644207. The next prime is 1343644259. The reversal of 1343644217 is 7124463431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1304943376 + 38700841 = 36124^2 + 6221^2 .

It is a cyclic number.

It is not a de Polignac number, because 1343644217 - 2¹⁰ = 1343643193 is a prime.

It is not a weakly prime, because it can be changed into another prime (1343644207) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671822108 + 671822109.

It is an arithmetic number, because the mean of its divisors is an integer number (671822109).

Almost surely, 2^1343644217 is an apocalyptic number.

It is an amenable number.

1343644217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1343644217 is an equidigital number, since it uses as much as digits as its factorization.

1343644217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 48384, while the sum is 35.

The square root of 1343644217 is about 36655.7528499961. The cubic root of 1343644217 is about 1103.4722831569.

The spelling of 1343644217 in words is "one billion, three hundred forty-three million, six hundred forty-four thousand, two hundred seventeen".