6403279669 has 2 divisors, whose sum is σ = 6403279670. Its totient is φ = 6403279668.

The previous prime is 6403279651. The next prime is 6403279693. The reversal of 6403279669 is 9669723046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3544773444 + 2858506225 = 59538^2 + 53465^2 .

It is a cyclic number.

It is not a de Polignac number, because 6403279669 - 2⁷ = 6403279541 is a prime.

It is a super-2 number, since 2×6403279669² = 82003981038857499122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6403279609) 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, 3201639834 + 3201639835.

It is an arithmetic number, because the mean of its divisors is an integer number (3201639835).

Almost surely, 2^6403279669 is an apocalyptic number.

It is an amenable number.

6403279669 is a deficient number, since it is larger than the sum of its proper divisors (1).

6403279669 is an equidigital number, since it uses as much as digits as its factorization.

6403279669 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 6403279669 is about 80020.4953058902. The cubic root of 6403279669 is about 1856.9526225167.

The spelling of 6403279669 in words is "six billion, four hundred three million, two hundred seventy-nine thousand, six hundred sixty-nine".