426645997 has 2 divisors, whose sum is σ = 426645998. Its totient is φ = 426645996.

The previous prime is 426645983. The next prime is 426646013. The reversal of 426645997 is 799546624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 357739396 + 68906601 = 18914^2 + 8301^2 .

It is a cyclic number.

It is not a de Polignac number, because 426645997 - 2¹¹ = 426643949 is a prime.

It is a super-2 number, since 2×426645997² = 364053613512248018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426645907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213322998 + 213322999.

It is an arithmetic number, because the mean of its divisors is an integer number (213322999).

Almost surely, 2^426645997 is an apocalyptic number.

It is an amenable number.

426645997 is a deficient number, since it is larger than the sum of its proper divisors (1).

426645997 is an equidigital number, since it uses as much as digits as its factorization.

426645997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3265920, while the sum is 52.

The square root of 426645997 is about 20655.4108407458. The cubic root of 426645997 is about 752.8166660954.

The spelling of 426645997 in words is "four hundred twenty-six million, six hundred forty-five thousand, nine hundred ninety-seven".