424195217 has 2 divisors, whose sum is σ = 424195218. Its totient is φ = 424195216.

The previous prime is 424195201. The next prime is 424195229. The reversal of 424195217 is 712591424.

It is a Cunningham number, because it is equal to 20596²+1.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 424195216 + 1 = 20596^2 + 1^2 .

It is a cyclic number.

It is not a de Polignac number, because 424195217 - 2⁴ = 424195201 is a prime.

It is a Chen prime.

It is equal to p_22555844 and since 424195217 and 22555844 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 (424195297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 212097608 + 212097609.

It is an arithmetic number, because the mean of its divisors is an integer number (212097609).

Almost surely, 2^424195217 is an apocalyptic number.

It is an amenable number.

424195217 is a deficient number, since it is larger than the sum of its proper divisors (1).

424195217 is an equidigital number, since it uses as much as digits as its factorization.

424195217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 20160, while the sum is 35.

The square root of 424195217 is about 20596.0000242766. Note that the first 4 decimals coincide. The cubic root of 424195217 is about 751.3724304550.

The spelling of 424195217 in words is "four hundred twenty-four million, one hundred ninety-five thousand, two hundred seventeen".