425552009 has 2 divisors, whose sum is σ = 425552010. Its totient is φ = 425552008.

The previous prime is 425551993. The next prime is 425552051. The reversal of 425552009 is 900255524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 301786384 + 123765625 = 17372^2 + 11125^2 .

It is a cyclic number.

It is not a de Polignac number, because 425552009 - 2⁴ = 425551993 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is equal to p_22624286 and since 425552009 and 22624286 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (425552089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212776004 + 212776005.

It is an arithmetic number, because the mean of its divisors is an integer number (212776005).

Almost surely, 2^425552009 is an apocalyptic number.

It is an amenable number.

425552009 is a deficient number, since it is larger than the sum of its proper divisors (1).

425552009 is an equidigital number, since it uses as much as digits as its factorization.

425552009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 32.

The square root of 425552009 is about 20628.9119684001. The cubic root of 425552009 is about 752.1726682356.

The spelling of 425552009 in words is "four hundred twenty-five million, five hundred fifty-two thousand, nine".