426664289 has 4 divisors (see below), whose sum is σ = 426774420. Its totient is φ = 426554160.

The previous prime is 426664267. The next prime is 426664313. The reversal of 426664289 is 982466624.

It is a happy number.

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 236913664 + 189750625 = 15392^2 + 13775^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426664289 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (426664219) 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, 49034 + ... + 57075.

It is an arithmetic number, because the mean of its divisors is an integer number (106693605).

Almost surely, 2^426664289 is an apocalyptic number.

It is an amenable number.

426664289 is a deficient number, since it is larger than the sum of its proper divisors (110131).

426664289 is a wasteful number, since it uses less digits than its factorization.

426664289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110130.

The product of its digits is 995328, while the sum is 47.

The square root of 426664289 is about 20655.8536255464. The cubic root of 426664289 is about 752.8274246835.

The spelling of 426664289 in words is "four hundred twenty-six million, six hundred sixty-four thousand, two hundred eighty-nine".