420599663 has 16 divisors (see below), whose sum is σ = 473485824. Its totient is φ = 370325760.

The previous prime is 420599657. The next prime is 420599681. The reversal of 420599663 is 366995024.

It is a cyclic number.

It is not a de Polignac number, because 420599663 - 2¹⁴ = 420583279 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420599603) 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 in 15 ways as a sum of consecutive naturals, for example, 45956 + ... + 54342.

It is an arithmetic number, because the mean of its divisors is an integer number (29592864).

Almost surely, 2^420599663 is an apocalyptic number.

420599663 is a deficient number, since it is larger than the sum of its proper divisors (52886161).

420599663 is a wasteful number, since it uses less digits than its factorization.

420599663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8542.

The product of its (nonzero) digits is 349920, while the sum is 44.

The square root of 420599663 is about 20508.5265926151. The cubic root of 420599663 is about 749.2434819045.

The spelling of 420599663 in words is "four hundred twenty million, five hundred ninety-nine thousand, six hundred sixty-three".