426960689 has 2 divisors, whose sum is σ = 426960690. Its totient is φ = 426960688.

The previous prime is 426960683. The next prime is 426960691. The reversal of 426960689 is 986069624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 424978225 + 1982464 = 20615^2 + 1408^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-426960689 is a prime.

It is a Sophie Germain prime.

Together with 426960691, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (426960683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213480344 + 213480345.

It is an arithmetic number, because the mean of its divisors is an integer number (213480345).

Almost surely, 2^426960689 is an apocalyptic number.

It is an amenable number.

426960689 is a deficient number, since it is larger than the sum of its proper divisors (1).

426960689 is an equidigital number, since it uses as much as digits as its factorization.

426960689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 50.

The square root of 426960689 is about 20663.0271015648. The cubic root of 426960689 is about 753.0017119031.

The spelling of 426960689 in words is "four hundred twenty-six million, nine hundred sixty thousand, six hundred eighty-nine".