420263009 has 4 divisors (see below), whose sum is σ = 421322004. Its totient is φ = 419204016.

The previous prime is 420263003. The next prime is 420263017. The reversal of 420263009 is 900362024.

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 92544400 + 327718609 = 9620^2 + 18103^2 .

It is a cyclic number.

It is not a de Polignac number, because 420263009 - 2²⁴ = 403485793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420263003) 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, 528902 + ... + 529695.

It is an arithmetic number, because the mean of its divisors is an integer number (105330501).

Almost surely, 2^420263009 is an apocalyptic number.

It is an amenable number.

420263009 is a deficient number, since it is larger than the sum of its proper divisors (1058995).

420263009 is a wasteful number, since it uses less digits than its factorization.

420263009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058994.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 420263009 is about 20500.3172902275. The cubic root of 420263009 is about 749.0435268046.

The spelling of 420263009 in words is "four hundred twenty million, two hundred sixty-three thousand, nine".