426813917 has 4 divisors (see below), whose sum is σ = 451920636. Its totient is φ = 401707200.

The previous prime is 426813913. The next prime is 426813923. The reversal of 426813917 is 719318624.

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 372142681 + 54671236 = 19291^2 + 7394^2 .

It is a cyclic number.

It is not a de Polignac number, because 426813917 - 2² = 426813913 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 (426813911) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12553334 + ... + 12553367.

It is an arithmetic number, because the mean of its divisors is an integer number (112980159).

Almost surely, 2^426813917 is an apocalyptic number.

It is an amenable number.

426813917 is a deficient number, since it is larger than the sum of its proper divisors (25106719).

426813917 is a wasteful number, since it uses less digits than its factorization.

426813917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25106718.

The product of its digits is 72576, while the sum is 41.

The square root of 426813917 is about 20659.4752353490. The cubic root of 426813917 is about 752.9154180618.

The spelling of 426813917 in words is "four hundred twenty-six million, eight hundred thirteen thousand, nine hundred seventeen".