420311593 has 4 divisors (see below), whose sum is σ = 452643268. Its totient is φ = 387979920.

The previous prime is 420311581. The next prime is 420311599. The reversal of 420311593 is 395113024.

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 143688169 + 276623424 = 11987^2 + 16632^2 .

It is a cyclic number.

It is not a de Polignac number, because 420311593 - 2⁹ = 420311081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420311599) 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 3 ways as a sum of consecutive naturals, for example, 16165818 + ... + 16165843.

It is an arithmetic number, because the mean of its divisors is an integer number (113160817).

Almost surely, 2^420311593 is an apocalyptic number.

It is an amenable number.

420311593 is a deficient number, since it is larger than the sum of its proper divisors (32331675).

420311593 is a wasteful number, since it uses less digits than its factorization.

420311593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32331674.

The product of its (nonzero) digits is 3240, while the sum is 28.

The square root of 420311593 is about 20501.5022132526. The cubic root of 420311593 is about 749.0723897846.

The spelling of 420311593 in words is "four hundred twenty million, three hundred eleven thousand, five hundred ninety-three".