420456349 has 2 divisors, whose sum is σ = 420456350. Its totient is φ = 420456348.

The previous prime is 420456341. The next prime is 420456373. The reversal of 420456349 is 943654024.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 360316324 + 60140025 = 18982^2 + 7755^2 .

It is a cyclic number.

It is not a de Polignac number, because 420456349 - 2³ = 420456341 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420456341) 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, 210228174 + 210228175.

It is an arithmetic number, because the mean of its divisors is an integer number (210228175).

Almost surely, 2^420456349 is an apocalyptic number.

It is an amenable number.

420456349 is a deficient number, since it is larger than the sum of its proper divisors (1).

420456349 is an equidigital number, since it uses as much as digits as its factorization.

420456349 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 103680, while the sum is 37.

The square root of 420456349 is about 20505.0322847832. The cubic root of 420456349 is about 749.1583738331.

The spelling of 420456349 in words is "four hundred twenty million, four hundred fifty-six thousand, three hundred forty-nine".