425661443 has 2 divisors, whose sum is σ = 425661444. Its totient is φ = 425661442.

The previous prime is 425661413. The next prime is 425661451. The reversal of 425661443 is 344166524.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 425661443 - 2²⁴ = 408884227 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (425661413) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212830721 + 212830722.

It is an arithmetic number, because the mean of its divisors is an integer number (212830722).

Almost surely, 2^425661443 is an apocalyptic number.

425661443 is a deficient number, since it is larger than the sum of its proper divisors (1).

425661443 is an equidigital number, since it uses as much as digits as its factorization.

425661443 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69120, while the sum is 35.

The square root of 425661443 is about 20631.5642402606. The cubic root of 425661443 is about 752.2371383883.

The spelling of 425661443 in words is "four hundred twenty-five million, six hundred sixty-one thousand, four hundred forty-three".