1343001721 has 2 divisors, whose sum is σ = 1343001722. Its totient is φ = 1343001720.

The previous prime is 1343001713. The next prime is 1343001731. The reversal of 1343001721 is 1271003431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1177519225 + 165482496 = 34315^2 + 12864^2 .

It is an emirp because it is prime and its reverse (1271003431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1343001721 - 2³ = 1343001713 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1343001692 and 1343001701.

It is not a weakly prime, because it can be changed into another prime (1343001731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671500860 + 671500861.

It is an arithmetic number, because the mean of its divisors is an integer number (671500861).

Almost surely, 2^1343001721 is an apocalyptic number.

It is an amenable number.

1343001721 is a deficient number, since it is larger than the sum of its proper divisors (1).

1343001721 is an equidigital number, since it uses as much as digits as its factorization.

1343001721 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 504, while the sum is 22.

The square root of 1343001721 is about 36646.9878844087. The cubic root of 1343001721 is about 1103.2963711226.

The spelling of 1343001721 in words is "one billion, three hundred forty-three million, one thousand, seven hundred twenty-one".