420204277 has 2 divisors, whose sum is σ = 420204278. Its totient is φ = 420204276.

The previous prime is 420204271. The next prime is 420204329. The reversal of 420204277 is 772402024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 415915236 + 4289041 = 20394^2 + 2071^2 .

It is a cyclic number.

It is not a de Polignac number, because 420204277 - 2⁷ = 420204149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420204271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210102138 + 210102139.

It is an arithmetic number, because the mean of its divisors is an integer number (210102139).

Almost surely, 2^420204277 is an apocalyptic number.

It is an amenable number.

420204277 is a deficient number, since it is larger than the sum of its proper divisors (1).

420204277 is an equidigital number, since it uses as much as digits as its factorization.

420204277 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6272, while the sum is 28.

The square root of 420204277 is about 20498.8847745432. The cubic root of 420204277 is about 749.0086320895.

The spelling of 420204277 in words is "four hundred twenty million, two hundred four thousand, two hundred seventy-seven".