420643317 has 8 divisors (see below), whose sum is σ = 566003680. Its totient is φ = 277855920.

The previous prime is 420643303. The next prime is 420643331. The reversal of 420643317 is 713346024.

It is an interprime number because it is at equal distance from previous prime (420643303) and next prime (420643331).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 420643317 - 2¹⁰ = 420642293 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 (420643357) 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 in 7 ways as a sum of consecutive naturals, for example, 642859 + ... + 643512.

It is an arithmetic number, because the mean of its divisors is an integer number (70750460).

Almost surely, 2^420643317 is an apocalyptic number.

It is an amenable number.

420643317 is a deficient number, since it is larger than the sum of its proper divisors (145360363).

420643317 is a wasteful number, since it uses less digits than its factorization.

420643317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286483.

The product of its (nonzero) digits is 12096, while the sum is 30.

The square root of 420643317 is about 20509.5908540370. The cubic root of 420643317 is about 749.2694023116.

It can be divided in two parts, 4206433 and 17, that added together give a triangular number (4206450 = T₂₉₀₀).

The spelling of 420643317 in words is "four hundred twenty million, six hundred forty-three thousand, three hundred seventeen".