426021909 has 8 divisors (see below), whose sum is σ = 568693920. Its totient is φ = 283682256.

The previous prime is 426021901. The next prime is 426021929. The reversal of 426021909 is 909120624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 426021909 - 2³ = 426021901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 426021909.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426021901) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 80082 + ... + 85235.

It is an arithmetic number, because the mean of its divisors is an integer number (71086740).

Almost surely, 2^426021909 is an apocalyptic number.

It is an amenable number.

426021909 is a deficient number, since it is larger than the sum of its proper divisors (142672011).

426021909 is a wasteful number, since it uses less digits than its factorization.

426021909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 166179.

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 426021909 is about 20640.2981809857. The cubic root of 426021909 is about 752.4494193071.

The spelling of 426021909 in words is "four hundred twenty-six million, twenty-one thousand, nine hundred nine".