420203447 has 2 divisors, whose sum is σ = 420203448. Its totient is φ = 420203446.

The previous prime is 420203401. The next prime is 420203461. The reversal of 420203447 is 744302024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420203447 - 2¹⁴ = 420187063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420203477) 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, 210101723 + 210101724.

It is an arithmetic number, because the mean of its divisors is an integer number (210101724).

Almost surely, 2^420203447 is an apocalyptic number.

420203447 is a deficient number, since it is larger than the sum of its proper divisors (1).

420203447 is an equidigital number, since it uses as much as digits as its factorization.

420203447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5376, while the sum is 26.

The square root of 420203447 is about 20498.8645295294. The cubic root of 420203447 is about 749.0081389345.

The spelling of 420203447 in words is "four hundred twenty million, two hundred three thousand, four hundred forty-seven".