426643279 has 2 divisors, whose sum is σ = 426643280. Its totient is φ = 426643278.

The previous prime is 426643277. The next prime is 426643303. The reversal of 426643279 is 972346624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 426643279 - 2¹ = 426643277 is a prime.

Together with 426643277, 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 (426643277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213321639 + 213321640.

It is an arithmetic number, because the mean of its divisors is an integer number (213321640).

Almost surely, 2^426643279 is an apocalyptic number.

426643279 is a deficient number, since it is larger than the sum of its proper divisors (1).

426643279 is an equidigital number, since it uses as much as digits as its factorization.

426643279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 43.

The square root of 426643279 is about 20655.3450467427. The cubic root of 426643279 is about 752.8150674554.

The spelling of 426643279 in words is "four hundred twenty-six million, six hundred forty-three thousand, two hundred seventy-nine".