420605323 has 4 divisors (see below), whose sum is σ = 424327608. Its totient is φ = 416883040.

The previous prime is 420605321. The next prime is 420605329. The reversal of 420605323 is 323506024.

It is a happy number.

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 420605323 - 2¹ = 420605321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (420605321) 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, 1860973 + ... + 1861198.

It is an arithmetic number, because the mean of its divisors is an integer number (106081902).

Almost surely, 2^420605323 is an apocalyptic number.

420605323 is a deficient number, since it is larger than the sum of its proper divisors (3722285).

420605323 is a wasteful number, since it uses less digits than its factorization.

420605323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3722284.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 420605323 is about 20508.6645835364. The cubic root of 420605323 is about 749.2468427402.

The spelling of 420605323 in words is "four hundred twenty million, six hundred five thousand, three hundred twenty-three".