426789217 has 2 divisors, whose sum is σ = 426789218. Its totient is φ = 426789216.

The previous prime is 426789197. The next prime is 426789221. The reversal of 426789217 is 712987624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 358875136 + 67914081 = 18944^2 + 8241^2 .

It is a cyclic number.

It is not a de Polignac number, because 426789217 - 2⁷ = 426789089 is a prime.

It is not a weakly prime, because it can be changed into another prime (426789287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213394608 + 213394609.

It is an arithmetic number, because the mean of its divisors is an integer number (213394609).

Almost surely, 2^426789217 is an apocalyptic number.

It is an amenable number.

426789217 is a deficient number, since it is larger than the sum of its proper divisors (1).

426789217 is an equidigital number, since it uses as much as digits as its factorization.

426789217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 46.

The square root of 426789217 is about 20658.8774380410. The cubic root of 426789217 is about 752.9008938794.

The spelling of 426789217 in words is "four hundred twenty-six million, seven hundred eighty-nine thousand, two hundred seventeen".