426343681 has 2 divisors, whose sum is σ = 426343682. Its totient is φ = 426343680.

The previous prime is 426343661. The next prime is 426343691. The reversal of 426343681 is 186343624.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 326163600 + 100180081 = 18060^2 + 10009^2 .

It is a cyclic number.

It is not a de Polignac number, because 426343681 - 2⁵ = 426343649 is a prime.

It is a super-2 number, since 2×426343681² = 363537868657259522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 426343681.

It is not a weakly prime, because it can be changed into another prime (426343661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213171840 + 213171841.

It is an arithmetic number, because the mean of its divisors is an integer number (213171841).

Almost surely, 2^426343681 is an apocalyptic number.

It is an amenable number.

426343681 is a deficient number, since it is larger than the sum of its proper divisors (1).

426343681 is an equidigital number, since it uses as much as digits as its factorization.

426343681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 37.

The square root of 426343681 is about 20648.0914614402. The cubic root of 426343681 is about 752.6388119325.

The spelling of 426343681 in words is "four hundred twenty-six million, three hundred forty-three thousand, six hundred eighty-one".