420322417 has 2 divisors, whose sum is σ = 420322418. Its totient is φ = 420322416.

The previous prime is 420322411. The next prime is 420322451. The reversal of 420322417 is 714223024.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 295977616 + 124344801 = 17204^2 + 11151^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420322417 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420322391 and 420322400.

It is not a weakly prime, because it can be changed into another prime (420322411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210161208 + 210161209.

It is an arithmetic number, because the mean of its divisors is an integer number (210161209).

Almost surely, 2^420322417 is an apocalyptic number.

It is an amenable number.

420322417 is a deficient number, since it is larger than the sum of its proper divisors (1).

420322417 is an equidigital number, since it uses as much as digits as its factorization.

420322417 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 25.

The square root of 420322417 is about 20501.7661922089. The cubic root of 420322417 is about 749.0788198475.

The spelling of 420322417 in words is "four hundred twenty million, three hundred twenty-two thousand, four hundred seventeen".