1343220397 has 2 divisors, whose sum is σ = 1343220398. Its totient is φ = 1343220396.

The previous prime is 1343220383. The next prime is 1343220413. The reversal of 1343220397 is 7930223431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1105629001 + 237591396 = 33251^2 + 15414^2 .

It is a cyclic number.

It is not a de Polignac number, because 1343220397 - 2¹⁹ = 1342696109 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1343220317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671610198 + 671610199.

It is an arithmetic number, because the mean of its divisors is an integer number (671610199).

Almost surely, 2^1343220397 is an apocalyptic number.

It is an amenable number.

1343220397 is a deficient number, since it is larger than the sum of its proper divisors (1).

1343220397 is an equidigital number, since it uses as much as digits as its factorization.

1343220397 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 34.

The square root of 1343220397 is about 36649.9713096750. The cubic root of 1343220397 is about 1103.3562497611.

The spelling of 1343220397 in words is "one billion, three hundred forty-three million, two hundred twenty thousand, three hundred ninety-seven".