1343730281 has 2 divisors, whose sum is σ = 1343730282. Its totient is φ = 1343730280.

The previous prime is 1343730239. The next prime is 1343730299. The reversal of 1343730281 is 1820373431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 879715600 + 464014681 = 29660^2 + 21541^2 .

It is an emirp because it is prime and its reverse (1820373431) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1343730281 is a prime.

It is a super-2 number, since 2×1343730281² = 3611222136152677922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1343730211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671865140 + 671865141.

It is an arithmetic number, because the mean of its divisors is an integer number (671865141).

Almost surely, 2^1343730281 is an apocalyptic number.

It is an amenable number.

1343730281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1343730281 is an equidigital number, since it uses as much as digits as its factorization.

1343730281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 1343730281 is about 36656.9267806236. The cubic root of 1343730281 is about 1103.4958427693.

The spelling of 1343730281 in words is "one billion, three hundred forty-three million, seven hundred thirty thousand, two hundred eighty-one".