426916809 has 12 divisors (see below), whose sum is σ = 672717552. Its totient is φ = 258737400.

The previous prime is 426916781. The next prime is 426916811. The reversal of 426916809 is 908619624.

It is a happy number.

It is not a de Polignac number, because 426916809 - 2²¹ = 424819657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (426916829) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2156047 + ... + 2156244.

It is an arithmetic number, because the mean of its divisors is an integer number (56059796).

Almost surely, 2^426916809 is an apocalyptic number.

It is an amenable number.

426916809 is a deficient number, since it is larger than the sum of its proper divisors (245800743).

426916809 is a wasteful number, since it uses less digits than its factorization.

426916809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4312308 (or 4312305 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 45.

The square root of 426916809 is about 20661.9652743876. The cubic root of 426916809 is about 752.9759149558.

The spelling of 426916809 in words is "four hundred twenty-six million, nine hundred sixteen thousand, eight hundred nine".