1343738281 has 2 divisors, whose sum is σ = 1343738282. Its totient is φ = 1343738280.

The previous prime is 1343738237. The next prime is 1343738321. The reversal of 1343738281 is 1828373431.

It is a happy number.

It is an a-pointer prime, because the next prime (1343738321) can be obtained adding 1343738281 to its sum of digits (40).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1231378281 + 112360000 = 35091^2 + 10600^2 .

It is a cyclic number.

It is not a de Polignac number, because 1343738281 - 2⁷ = 1343738153 is a prime.

It is a super-2 number, since 2×1343738281² = 3611265135649669922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1343730281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671869140 + 671869141.

It is an arithmetic number, because the mean of its divisors is an integer number (671869141).

Almost surely, 2^1343738281 is an apocalyptic number.

It is an amenable number.

1343738281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1343738281 is an equidigital number, since it uses as much as digits as its factorization.

1343738281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96768, while the sum is 40.

The square root of 1343738281 is about 36657.0359003562. The cubic root of 1343738281 is about 1103.4980326803.

The spelling of 1343738281 in words is "one billion, three hundred forty-three million, seven hundred thirty-eight thousand, two hundred eighty-one".