421826617 has 2 divisors, whose sum is σ = 421826618. Its totient is φ = 421826616.

The previous prime is 421826557. The next prime is 421826659. The reversal of 421826617 is 716628124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 213861376 + 207965241 = 14624^2 + 14421^2 .

It is a cyclic number.

It is not a de Polignac number, because 421826617 - 2¹¹ = 421824569 is a prime.

It is not a weakly prime, because it can be changed into another prime (421826687) 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, 210913308 + 210913309.

It is an arithmetic number, because the mean of its divisors is an integer number (210913309).

Almost surely, 2^421826617 is an apocalyptic number.

It is an amenable number.

421826617 is a deficient number, since it is larger than the sum of its proper divisors (1).

421826617 is an equidigital number, since it uses as much as digits as its factorization.

421826617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 37.

The square root of 421826617 is about 20538.4180744282. The cubic root of 421826617 is about 749.9713274965.

The spelling of 421826617 in words is "four hundred twenty-one million, eight hundred twenty-six thousand, six hundred seventeen".