420170317 has 16 divisors (see below), whose sum is σ = 512341632. Its totient is φ = 336360960.

The previous prime is 420170297. The next prime is 420170339. The reversal of 420170317 is 713071024.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 420170317 - 2⁷ = 420170189 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420170291 and 420170300.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420170717) 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 15 ways as a sum of consecutive naturals, for example, 2113 + ... + 29065.

It is an arithmetic number, because the mean of its divisors is an integer number (32021352).

Almost surely, 2^420170317 is an apocalyptic number.

It is an amenable number.

420170317 is a deficient number, since it is larger than the sum of its proper divisors (92171315).

420170317 is a wasteful number, since it uses less digits than its factorization.

420170317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27108.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 420170317 is about 20498.0564200609. The cubic root of 420170317 is about 748.9884537939.

The spelling of 420170317 in words is "four hundred twenty million, one hundred seventy thousand, three hundred seventeen".