6347920669 has 2 divisors, whose sum is σ = 6347920670. Its totient is φ = 6347920668.

The previous prime is 6347920633. The next prime is 6347920679. The reversal of 6347920669 is 9660297436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 3920387769 + 2427532900 = 62613^2 + 49270^2 .

It is a cyclic number.

It is not a de Polignac number, because 6347920669 - 2²⁵ = 6314366237 is a prime.

It is a super-2 number, since 2×6347920669² = 80592193639834815122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6347920609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3173960334 + 3173960335.

It is an arithmetic number, because the mean of its divisors is an integer number (3173960335).

Almost surely, 2^6347920669 is an apocalyptic number.

It is an amenable number.

6347920669 is a deficient number, since it is larger than the sum of its proper divisors (1).

6347920669 is an equidigital number, since it uses as much as digits as its factorization.

6347920669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2939328, while the sum is 52.

The square root of 6347920669 is about 79673.8393012412. The cubic root of 6347920669 is about 1851.5857520263.

It can be divided in two parts, 63479 and 20669, that added together give a palindrome (84148).

The spelling of 6347920669 in words is "six billion, three hundred forty-seven million, nine hundred twenty thousand, six hundred sixty-nine".