426667789 has 4 divisors (see below), whose sum is σ = 431066524. Its totient is φ = 422269056.

The previous prime is 426667783. The next prime is 426667823. The reversal of 426667789 is 987766624.

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 274564900 + 152102889 = 16570^2 + 12333^2 .

It is a cyclic number.

It is not a de Polignac number, because 426667789 - 2¹⁵ = 426635021 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426667783) 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 3 ways as a sum of consecutive naturals, for example, 2199222 + ... + 2199415.

It is an arithmetic number, because the mean of its divisors is an integer number (107766631).

Almost surely, 2^426667789 is an apocalyptic number.

It is an amenable number.

426667789 is a deficient number, since it is larger than the sum of its proper divisors (4398735).

426667789 is an equidigital number, since it uses as much as digits as its factorization.

426667789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4398734.

The product of its digits is 6096384, while the sum is 55.

The square root of 426667789 is about 20655.9383471195. The cubic root of 426667789 is about 752.8294832018.

The spelling of 426667789 in words is "four hundred twenty-six million, six hundred sixty-seven thousand, seven hundred eighty-nine".