420000349 has 2 divisors, whose sum is σ = 420000350. Its totient is φ = 420000348.

The previous prime is 420000341. The next prime is 420000389. The reversal of 420000349 is 943000024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 258888100 + 161112249 = 16090^2 + 12693^2 .

It is a cyclic number.

It is not a de Polignac number, because 420000349 - 2³ = 420000341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420000341) 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, 210000174 + 210000175.

It is an arithmetic number, because the mean of its divisors is an integer number (210000175).

Almost surely, 2^420000349 is an apocalyptic number.

It is an amenable number.

420000349 is a deficient number, since it is larger than the sum of its proper divisors (1).

420000349 is an equidigital number, since it uses as much as digits as its factorization.

420000349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 420000349 is about 20493.9100466456. The cubic root of 420000349 is about 748.8874461517.

The spelling of 420000349 in words is "four hundred twenty million, three hundred forty-nine", and thus it is an aban number.