421323313 has 2 divisors, whose sum is σ = 421323314. Its totient is φ = 421323312.

The previous prime is 421323299. The next prime is 421323319. The reversal of 421323313 is 313323124.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 415833664 + 5489649 = 20392^2 + 2343^2 .

It is a cyclic number.

It is not a de Polignac number, because 421323313 - 2²¹ = 419226161 is a prime.

It is not a weakly prime, because it can be changed into another prime (421323319) 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 as a sum of consecutive naturals, namely, 210661656 + 210661657.

It is an arithmetic number, because the mean of its divisors is an integer number (210661657).

Almost surely, 2^421323313 is an apocalyptic number.

It is an amenable number.

421323313 is a deficient number, since it is larger than the sum of its proper divisors (1).

421323313 is an equidigital number, since it uses as much as digits as its factorization.

421323313 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 22.

The square root of 421323313 is about 20526.1616723634. The cubic root of 421323313 is about 749.6729317596.

Adding to 421323313 its reverse (313323124), we get a palindrome (734646437).

The spelling of 421323313 in words is "four hundred twenty-one million, three hundred twenty-three thousand, three hundred thirteen".