426631217 has 2 divisors, whose sum is σ = 426631218. Its totient is φ = 426631216.

The previous prime is 426631159. The next prime is 426631223. The reversal of 426631217 is 712136624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 383807281 + 42823936 = 19591^2 + 6544^2 .

It is a cyclic number.

It is not a de Polignac number, because 426631217 - 2⁸ = 426630961 is a prime.

It is not a weakly prime, because it can be changed into another prime (426631297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213315608 + 213315609.

It is an arithmetic number, because the mean of its divisors is an integer number (213315609).

Almost surely, 2^426631217 is an apocalyptic number.

It is an amenable number.

426631217 is a deficient number, since it is larger than the sum of its proper divisors (1).

426631217 is an equidigital number, since it uses as much as digits as its factorization.

426631217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12096, while the sum is 32.

The square root of 426631217 is about 20655.0530621444. The cubic root of 426631217 is about 752.8079728939.

The spelling of 426631217 in words is "four hundred twenty-six million, six hundred thirty-one thousand, two hundred seventeen".