420200273 has 2 divisors, whose sum is σ = 420200274. Its totient is φ = 420200272.

The previous prime is 420200213. The next prime is 420200279. The reversal of 420200273 is 372002024.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 259113409 + 161086864 = 16097^2 + 12692^2 .

It is a cyclic number.

It is not a de Polignac number, because 420200273 - 2⁸ = 420200017 is a prime.

It is not a weakly prime, because it can be changed into another prime (420200279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210100136 + 210100137.

It is an arithmetic number, because the mean of its divisors is an integer number (210100137).

Almost surely, 2^420200273 is an apocalyptic number.

It is an amenable number.

420200273 is a deficient number, since it is larger than the sum of its proper divisors (1).

420200273 is an equidigital number, since it uses as much as digits as its factorization.

420200273 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 420200273 is about 20498.7871104610. The cubic root of 420200273 is about 749.0062530561.

Adding to 420200273 its reverse (372002024), we get a palindrome (792202297).

The spelling of 420200273 in words is "four hundred twenty million, two hundred thousand, two hundred seventy-three".