425312009 has 2 divisors, whose sum is σ = 425312010. Its totient is φ = 425312008.

The previous prime is 425311987. The next prime is 425312059. The reversal of 425312009 is 900213524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 338449609 + 86862400 = 18397^2 + 9320^2 .

It is a cyclic number.

It is not a de Polignac number, because 425312009 - 2¹⁶ = 425246473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (425312059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212656004 + 212656005.

It is an arithmetic number, because the mean of its divisors is an integer number (212656005).

Almost surely, 2^425312009 is an apocalyptic number.

It is an amenable number.

425312009 is a deficient number, since it is larger than the sum of its proper divisors (1).

425312009 is an equidigital number, since it uses as much as digits as its factorization.

425312009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

The square root of 425312009 is about 20623.0940695134. The cubic root of 425312009 is about 752.0312398605.

The spelling of 425312009 in words is "four hundred twenty-five million, three hundred twelve thousand, nine".