426639553 has 2 divisors, whose sum is σ = 426639554. Its totient is φ = 426639552.

The previous prime is 426639541. The next prime is 426639569. The reversal of 426639553 is 355936624.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 300571569 + 126067984 = 17337^2 + 11228^2 .

It is a cyclic number.

It is not a de Polignac number, because 426639553 - 2⁹ = 426639041 is a prime.

It is not a weakly prime, because it can be changed into another prime (426639533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213319776 + 213319777.

It is an arithmetic number, because the mean of its divisors is an integer number (213319777).

Almost surely, 2^426639553 is an apocalyptic number.

It is an amenable number.

426639553 is a deficient number, since it is larger than the sum of its proper divisors (1).

426639553 is an equidigital number, since it uses as much as digits as its factorization.

426639553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 583200, while the sum is 43.

The square root of 426639553 is about 20655.2548519741. The cubic root of 426639553 is about 752.8128759313.

The spelling of 426639553 in words is "four hundred twenty-six million, six hundred thirty-nine thousand, five hundred fifty-three".