420342717 has 4 divisors (see below), whose sum is σ = 560456960. Its totient is φ = 280228476.

The previous prime is 420342707. The next prime is 420342721. The reversal of 420342717 is 717243024.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 420342717 - 2⁶ = 420342653 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 (420342707) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70057117 + ... + 70057122.

It is an arithmetic number, because the mean of its divisors is an integer number (140114240).

Almost surely, 2^420342717 is an apocalyptic number.

It is an amenable number.

420342717 is a deficient number, since it is larger than the sum of its proper divisors (140114243).

420342717 is a wasteful number, since it uses less digits than its factorization.

420342717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140114242.

The product of its (nonzero) digits is 9408, while the sum is 30.

The square root of 420342717 is about 20502.2612655287. The cubic root of 420342717 is about 749.0908788881.

The spelling of 420342717 in words is "four hundred twenty million, three hundred forty-two thousand, seven hundred seventeen".