420344117 has 2 divisors, whose sum is σ = 420344118. Its totient is φ = 420344116.

The previous prime is 420344059. The next prime is 420344149. The reversal of 420344117 is 711443024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 220997956 + 199346161 = 14866^2 + 14119^2 .

It is a cyclic number.

It is not a de Polignac number, because 420344117 - 2¹⁰ = 420343093 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420344017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210172058 + 210172059.

It is an arithmetic number, because the mean of its divisors is an integer number (210172059).

Almost surely, 2^420344117 is an apocalyptic number.

It is an amenable number.

420344117 is a deficient number, since it is larger than the sum of its proper divisors (1).

420344117 is an equidigital number, since it uses as much as digits as its factorization.

420344117 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 420344117 is about 20502.2954080757. The cubic root of 420344117 is about 749.0917105318.

The spelling of 420344117 in words is "four hundred twenty million, three hundred forty-four thousand, one hundred seventeen".