426685813 has 6 divisors (see below), whose sum is σ = 438530946. Its totient is φ = 415152432.

The previous prime is 426685807. The next prime is 426685823. The reversal of 426685813 is 318586624.

It can be written as a sum of positive squares in 3 ways, for example, as 344547844 + 82137969 = 18562^2 + 9063^2 .

It is not a de Polignac number, because 426685813 - 2¹³ = 426677621 is a prime.

It is a cake number, because a cake can be divided into 426685813 parts by 1368 planar cuts.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 426685813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (426685823) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 154470 + ... + 157207.

It is an arithmetic number, because the mean of its divisors is an integer number (73088491).

Almost surely, 2^426685813 is an apocalyptic number.

It is an amenable number.

426685813 is a deficient number, since it is larger than the sum of its proper divisors (11845133).

426685813 is an equidigital number, since it uses as much as digits as its factorization.

426685813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311751 (or 311714 counting only the distinct ones).

The product of its digits is 276480, while the sum is 43.

The square root of 426685813 is about 20656.3746335120. The cubic root of 426685813 is about 752.8400838048.

The spelling of 426685813 in words is "four hundred twenty-six million, six hundred eighty-five thousand, eight hundred thirteen".