426664393 has 4 divisors (see below), whose sum is σ = 427873428. Its totient is φ = 425455360.

The previous prime is 426664391. The next prime is 426664417. The reversal of 426664393 is 393466624.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 93857344 + 332807049 = 9688^2 + 18243^2 .

It is a cyclic number.

It is not a de Polignac number, because 426664393 - 2¹ = 426664391 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (426664391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 603988 + ... + 604693.

It is an arithmetic number, because the mean of its divisors is an integer number (106968357).

Almost surely, 2^426664393 is an apocalyptic number.

It is an amenable number.

426664393 is a deficient number, since it is larger than the sum of its proper divisors (1209035).

426664393 is a wasteful number, since it uses less digits than its factorization.

426664393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1209034.

The product of its digits is 559872, while the sum is 43.

The square root of 426664393 is about 20655.8561429925. The cubic root of 426664393 is about 752.8274858510.

The spelling of 426664393 in words is "four hundred twenty-six million, six hundred sixty-four thousand, three hundred ninety-three".