349716643 has 2 divisors, whose sum is σ = 349716644. Its totient is φ = 349716642.

The previous prime is 349716629. The next prime is 349716649. The reversal of 349716643 is 346617943.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 349716643 - 2⁹ = 349716131 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 349716643.

It is not a weakly prime, because it can be changed into another prime (349716649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 174858321 + 174858322.

It is an arithmetic number, because the mean of its divisors is an integer number (174858322).

Almost surely, 2^349716643 is an apocalyptic number.

349716643 is a deficient number, since it is larger than the sum of its proper divisors (1).

349716643 is an equidigital number, since it uses as much as digits as its factorization.

349716643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 326592, while the sum is 43.

The square root of 349716643 is about 18700.7123661105. The cubic root of 349716643 is about 704.5396407721.

It can be divided in two parts, 34971 and 6643, that added together give a palindrome (41614).

The spelling of 349716643 in words is "three hundred forty-nine million, seven hundred sixteen thousand, six hundred forty-three".