426664417 has 2 divisors, whose sum is σ = 426664418. Its totient is φ = 426664416.

The previous prime is 426664391. The next prime is 426664429. The reversal of 426664417 is 714466624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 395850816 + 30813601 = 19896^2 + 5551^2 .

It is a cyclic number.

It is not a de Polignac number, because 426664417 - 2¹⁵ = 426631649 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 426664417.

It is not a weakly prime, because it can be changed into another prime (426604417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213332208 + 213332209.

It is an arithmetic number, because the mean of its divisors is an integer number (213332209).

Almost surely, 2^426664417 is an apocalyptic number.

It is an amenable number.

426664417 is a deficient number, since it is larger than the sum of its proper divisors (1).

426664417 is an equidigital number, since it uses as much as digits as its factorization.

426664417 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 193536, while the sum is 40.

The square root of 426664417 is about 20655.8567239415. The cubic root of 426664417 is about 752.8274999666.

The spelling of 426664417 in words is "four hundred twenty-six million, six hundred sixty-four thousand, four hundred seventeen".