426943989 has 12 divisors (see below), whose sum is σ = 617744556. Its totient is φ = 284145792.

The previous prime is 426943939. The next prime is 426944047. The reversal of 426943989 is 989349624.

It can be written as a sum of positive squares in 2 ways, for example, as 139641489 + 287302500 = 11817^2 + 16950^2 .

It is not a de Polignac number, because 426943989 - 2¹¹ = 426941941 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426943939) 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 in 11 ways as a sum of consecutive naturals, for example, 34662 + ... + 45335.

It is an arithmetic number, because the mean of its divisors is an integer number (51478713).

Almost surely, 2^426943989 is an apocalyptic number.

It is an amenable number.

426943989 is a deficient number, since it is larger than the sum of its proper divisors (190800567).

426943989 is a wasteful number, since it uses less digits than its factorization.

426943989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80596 (or 80593 counting only the distinct ones).

The product of its digits is 3359232, while the sum is 54.

The square root of 426943989 is about 20662.6229941893. The cubic root of 426943989 is about 752.9918942213.

The spelling of 426943989 in words is "four hundred twenty-six million, nine hundred forty-three thousand, nine hundred eighty-nine".