420190297 has 2 divisors, whose sum is σ = 420190298. Its totient is φ = 420190296.

The previous prime is 420190279. The next prime is 420190321. The reversal of 420190297 is 792091024.

It is a happy number.

Together with previous prime (420190279) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 227979801 + 192210496 = 15099^2 + 13864^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420190297 is a prime.

It is not a weakly prime, because it can be changed into another prime (420190237) 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, 210095148 + 210095149.

It is an arithmetic number, because the mean of its divisors is an integer number (210095149).

Almost surely, 2^420190297 is an apocalyptic number.

It is an amenable number.

420190297 is a deficient number, since it is larger than the sum of its proper divisors (1).

420190297 is an equidigital number, since it uses as much as digits as its factorization.

420190297 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 34.

The square root of 420190297 is about 20498.5437775467. The cubic root of 420190297 is about 749.0003256083. Note that the first 3 decimals are identical.

The spelling of 420190297 in words is "four hundred twenty million, one hundred ninety thousand, two hundred ninety-seven".