420211447 has 2 divisors, whose sum is σ = 420211448. Its totient is φ = 420211446.

The previous prime is 420211427. The next prime is 420211481. The reversal of 420211447 is 744112024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420211447 - 2¹¹ = 420209399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420211427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210105723 + 210105724.

It is an arithmetic number, because the mean of its divisors is an integer number (210105724).

Almost surely, 2^420211447 is an apocalyptic number.

420211447 is a deficient number, since it is larger than the sum of its proper divisors (1).

420211447 is an equidigital number, since it uses as much as digits as its factorization.

420211447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1792, while the sum is 25.

The square root of 420211447 is about 20499.0596613601. The cubic root of 420211447 is about 749.0128922091.

The spelling of 420211447 in words is "four hundred twenty million, two hundred eleven thousand, four hundred forty-seven".