426989 has 4 divisors (see below), whose sum is σ = 452124. Its totient is φ = 401856.

The previous prime is 426973. The next prime is 426997. The reversal of 426989 is 989624.

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 293764 + 133225 = 542^2 + 365^2 .

It is a cyclic number.

It is not a de Polignac number, because 426989 - 2⁴ = 426973 is a prime.

It is a super-2 number, since 2×426989² = 364639212242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12542 + ... + 12575.

It is an arithmetic number, because the mean of its divisors is an integer number (113031).

2⁴²⁶⁹⁸⁹ is an apocalyptic number.

It is an amenable number.

426989 is a deficient number, since it is larger than the sum of its proper divisors (25135).

426989 is a wasteful number, since it uses less digits than its factorization.

426989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25134.

The product of its digits is 31104, while the sum is 38.

The square root of 426989 is about 653.4439532202. The cubic root of 426989 is about 75.3018354934.

The spelling of 426989 in words is "four hundred twenty-six thousand, nine hundred eighty-nine".