420664603 has 4 divisors (see below), whose sum is σ = 421763328. Its totient is φ = 419565880.

The previous prime is 420664597. The next prime is 420664613. The reversal of 420664603 is 306466024.

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

It is a cyclic number.

It is not a de Polignac number, because 420664603 - 2²¹ = 418567451 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420664613) 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, 548788 + ... + 549553.

It is an arithmetic number, because the mean of its divisors is an integer number (105440832).

Almost surely, 2^420664603 is an apocalyptic number.

420664603 is a deficient number, since it is larger than the sum of its proper divisors (1098725).

420664603 is a wasteful number, since it uses less digits than its factorization.

420664603 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098724.

The product of its (nonzero) digits is 20736, while the sum is 31.

The square root of 420664603 is about 20510.1097754254. The cubic root of 420664603 is about 749.2820406355.

The spelling of 420664603 in words is "four hundred twenty million, six hundred sixty-four thousand, six hundred three".