426644863 has 2 divisors, whose sum is σ = 426644864. Its totient is φ = 426644862.

The previous prime is 426644843. The next prime is 426644879. The reversal of 426644863 is 368446624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 426644863 - 2¹³ = 426636671 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426644843) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213322431 + 213322432.

It is an arithmetic number, because the mean of its divisors is an integer number (213322432).

Almost surely, 2^426644863 is an apocalyptic number.

426644863 is a deficient number, since it is larger than the sum of its proper divisors (1).

426644863 is an equidigital number, since it uses as much as digits as its factorization.

426644863 is an evil number, because the sum of its binary digits is even.

The product of its digits is 663552, while the sum is 43.

The square root of 426644863 is about 20655.3833902932. The cubic root of 426644863 is about 752.8159991139.

The spelling of 426644863 in words is "four hundred twenty-six million, six hundred forty-four thousand, eight hundred sixty-three".