6343420549 has 2 divisors, whose sum is σ = 6343420550. Its totient is φ = 6343420548.

The previous prime is 6343420547. The next prime is 6343420627. The reversal of 6343420549 is 9450243436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5986890625 + 356529924 = 77375^2 + 18882^2 .

It is a cyclic number.

It is not a de Polignac number, because 6343420549 - 2¹ = 6343420547 is a prime.

It is a super-2 number, since 2×6343420549² = 80477968522950922802, which contains 22 as substring.

Together with 6343420547, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6343420543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3171710274 + 3171710275.

It is an arithmetic number, because the mean of its divisors is an integer number (3171710275).

Almost surely, 2^6343420549 is an apocalyptic number.

It is an amenable number.

6343420549 is a deficient number, since it is larger than the sum of its proper divisors (1).

6343420549 is an equidigital number, since it uses as much as digits as its factorization.

6343420549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 311040, while the sum is 40.

The square root of 6343420549 is about 79645.5934060385. The cubic root of 6343420549 is about 1851.1481111958.

The spelling of 6343420549 in words is "six billion, three hundred forty-three million, four hundred twenty thousand, five hundred forty-nine".