425647169 has 2 divisors, whose sum is σ = 425647170. Its totient is φ = 425647168.

The previous prime is 425647163. The next prime is 425647171. The reversal of 425647169 is 961746524.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 380757169 + 44890000 = 19513^2 + 6700^2 .

It is a cyclic number.

It is not a de Polignac number, because 425647169 - 2²⁰ = 424598593 is a prime.

It is a super-2 number, since 2×425647169² = 362351024955429122, which contains 22 as substring.

Together with 425647171, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (425647163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212823584 + 212823585.

It is an arithmetic number, because the mean of its divisors is an integer number (212823585).

Almost surely, 2^425647169 is an apocalyptic number.

It is an amenable number.

425647169 is a deficient number, since it is larger than the sum of its proper divisors (1).

425647169 is an equidigital number, since it uses as much as digits as its factorization.

425647169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 425647169 is about 20631.2183110935. The cubic root of 425647169 is about 752.2287298646.

The spelling of 425647169 in words is "four hundred twenty-five million, six hundred forty-seven thousand, one hundred sixty-nine".