426643603 has 2 divisors, whose sum is σ = 426643604. Its totient is φ = 426643602.

The previous prime is 426643589. The next prime is 426643627. The reversal of 426643603 is 306346624.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 426643603 - 2⁵ = 426643571 is a prime.

It is not a weakly prime, because it can be changed into another prime (426643103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213321801 + 213321802.

It is an arithmetic number, because the mean of its divisors is an integer number (213321802).

Almost surely, 2^426643603 is an apocalyptic number.

426643603 is a deficient number, since it is larger than the sum of its proper divisors (1).

426643603 is an equidigital number, since it uses as much as digits as its factorization.

426643603 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 62208, while the sum is 34.

The square root of 426643603 is about 20655.3528897475. The cubic root of 426643603 is about 752.8152580221.

The spelling of 426643603 in words is "four hundred twenty-six million, six hundred forty-three thousand, six hundred three".