1366398343 has 2 divisors, whose sum is σ = 1366398344. Its totient is φ = 1366398342.

The previous prime is 1366398331. The next prime is 1366398347. The reversal of 1366398343 is 3438936631.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1366398343 - 2⁵ = 1366398311 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1366398293 and 1366398302.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1366398347) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 683199171 + 683199172.

It is an arithmetic number, because the mean of its divisors is an integer number (683199172).

Almost surely, 2^1366398343 is an apocalyptic number.

1366398343 is a deficient number, since it is larger than the sum of its proper divisors (1).

1366398343 is an equidigital number, since it uses as much as digits as its factorization.

1366398343 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 839808, while the sum is 46.

The square root of 1366398343 is about 36964.8257536810. The cubic root of 1366398343 is about 1109.6664157346. Note that the first 3 decimals are identical.

The spelling of 1366398343 in words is "one billion, three hundred sixty-six million, three hundred ninety-eight thousand, three hundred forty-three".