420273193 has 2 divisors, whose sum is σ = 420273194. Its totient is φ = 420273192.

The previous prime is 420273173. The next prime is 420273197. The reversal of 420273193 is 391372024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221801449 + 198471744 = 14893^2 + 14088^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420273193 is a prime.

It is not a weakly prime, because it can be changed into another prime (420273197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210136596 + 210136597.

It is an arithmetic number, because the mean of its divisors is an integer number (210136597).

Almost surely, 2^420273193 is an apocalyptic number.

It is an amenable number.

420273193 is a deficient number, since it is larger than the sum of its proper divisors (1).

420273193 is an equidigital number, since it uses as much as digits as its factorization.

420273193 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 420273193 is about 20500.5656751222. The cubic root of 420273193 is about 749.0495771410.

The spelling of 420273193 in words is "four hundred twenty million, two hundred seventy-three thousand, one hundred ninety-three".