420750317 has 4 divisors (see below), whose sum is σ = 453115740. Its totient is φ = 388384896.

The previous prime is 420750301. The next prime is 420750329. The reversal of 420750317 is 713057024.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 138980521 + 281769796 = 11789^2 + 16786^2 .

It is a cyclic number.

It is not a de Polignac number, because 420750317 - 2⁴ = 420750301 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 420750317.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420750217) 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, 16182692 + ... + 16182717.

It is an arithmetic number, because the mean of its divisors is an integer number (113278935).

Almost surely, 2^420750317 is an apocalyptic number.

It is an amenable number.

420750317 is a deficient number, since it is larger than the sum of its proper divisors (32365423).

420750317 is a wasteful number, since it uses less digits than its factorization.

420750317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32365422.

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 420750317 is about 20512.1992238765. The cubic root of 420750317 is about 749.3329280478.

The spelling of 420750317 in words is "four hundred twenty million, seven hundred fifty thousand, three hundred seventeen".