420054409 has 2 divisors, whose sum is σ = 420054410. Its totient is φ = 420054408.

The previous prime is 420054331. The next prime is 420054443. The reversal of 420054409 is 904450024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 411481225 + 8573184 = 20285^2 + 2928^2 .

It is a cyclic number.

It is not a de Polignac number, because 420054409 - 2¹⁹ = 419530121 is a prime.

It is not a weakly prime, because it can be changed into another prime (420054449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210027204 + 210027205.

It is an arithmetic number, because the mean of its divisors is an integer number (210027205).

Almost surely, 2^420054409 is an apocalyptic number.

It is an amenable number.

420054409 is a deficient number, since it is larger than the sum of its proper divisors (1).

420054409 is an equidigital number, since it uses as much as digits as its factorization.

420054409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 28.

The square root of 420054409 is about 20495.2289326077. The cubic root of 420054409 is about 748.9195755841.

The spelling of 420054409 in words is "four hundred twenty million, fifty-four thousand, four hundred nine".