425581669 has 2 divisors, whose sum is σ = 425581670. Its totient is φ = 425581668.

The previous prime is 425581657. The next prime is 425581687. The reversal of 425581669 is 966185524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 417384900 + 8196769 = 20430^2 + 2863^2 .

It is a cyclic number.

It is not a de Polignac number, because 425581669 - 2²³ = 417193061 is a prime.

It is a super-2 number, since 2×425581669² = 362239513977651122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (425581369) 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, 212790834 + 212790835.

It is an arithmetic number, because the mean of its divisors is an integer number (212790835).

Almost surely, 2^425581669 is an apocalyptic number.

It is an amenable number.

425581669 is a deficient number, since it is larger than the sum of its proper divisors (1).

425581669 is an equidigital number, since it uses as much as digits as its factorization.

425581669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 518400, while the sum is 46.

The square root of 425581669 is about 20629.6308498238. The cubic root of 425581669 is about 752.1901427335.

The spelling of 425581669 in words is "four hundred twenty-five million, five hundred eighty-one thousand, six hundred sixty-nine".