425889649 has 2 divisors, whose sum is σ = 425889650. Its totient is φ = 425889648.

The previous prime is 425889641. The next prime is 425889713. The reversal of 425889649 is 946988524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 265690000 + 160199649 = 16300^2 + 12657^2 .

It is a cyclic number.

It is not a de Polignac number, because 425889649 - 2³ = 425889641 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 425889649.

It is not a weakly prime, because it can be changed into another prime (425889641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212944824 + 212944825.

It is an arithmetic number, because the mean of its divisors is an integer number (212944825).

Almost surely, 2^425889649 is an apocalyptic number.

It is an amenable number.

425889649 is a deficient number, since it is larger than the sum of its proper divisors (1).

425889649 is an equidigital number, since it uses as much as digits as its factorization.

425889649 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4976640, while the sum is 55.

The square root of 425889649 is about 20637.0940056976. The cubic root of 425889649 is about 752.3715443915.

The spelling of 425889649 in words is "four hundred twenty-five million, eight hundred eighty-nine thousand, six hundred forty-nine".