426366557 has 2 divisors, whose sum is σ = 426366558. Its totient is φ = 426366556.

The previous prime is 426366553. The next prime is 426366569. The reversal of 426366557 is 755663624.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 336135556 + 90231001 = 18334^2 + 9499^2 .

It is a cyclic number.

It is not a de Polignac number, because 426366557 - 2² = 426366553 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (426366553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213183278 + 213183279.

It is an arithmetic number, because the mean of its divisors is an integer number (213183279).

Almost surely, 2^426366557 is an apocalyptic number.

It is an amenable number.

426366557 is a deficient number, since it is larger than the sum of its proper divisors (1).

426366557 is an equidigital number, since it uses as much as digits as its factorization.

426366557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 907200, while the sum is 44.

The square root of 426366557 is about 20648.6454035126. The cubic root of 426366557 is about 752.6522729487.

The spelling of 426366557 in words is "four hundred twenty-six million, three hundred sixty-six thousand, five hundred fifty-seven".