421826659 has 2 divisors, whose sum is σ = 421826660. Its totient is φ = 421826658.

The previous prime is 421826617. The next prime is 421826687. The reversal of 421826659 is 956628124.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 421826659 - 2⁹ = 421826147 is a prime.

It is not a weakly prime, because it can be changed into another prime (421826359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210913329 + 210913330.

It is an arithmetic number, because the mean of its divisors is an integer number (210913330).

Almost surely, 2^421826659 is an apocalyptic number.

421826659 is a deficient number, since it is larger than the sum of its proper divisors (1).

421826659 is an equidigital number, since it uses as much as digits as its factorization.

421826659 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 207360, while the sum is 43.

The square root of 421826659 is about 20538.4190969023. The cubic root of 421826659 is about 749.9713523872.

It can be divided in two parts, 42182 and 6659, that added together give a square (48841 = 221²).

The spelling of 421826659 in words is "four hundred twenty-one million, eight hundred twenty-six thousand, six hundred fifty-nine".