420323081 has 2 divisors, whose sum is σ = 420323082. Its totient is φ = 420323080.

The previous prime is 420323041. The next prime is 420323083. The reversal of 420323081 is 180323024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 278355856 + 141967225 = 16684^2 + 11915^2 .

It is a cyclic number.

It is not a de Polignac number, because 420323081 - 2¹⁴ = 420306697 is a prime.

It is a super-2 number, since 2×420323081² = 353342984842665122, which contains 22 as substring.

Together with 420323083, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (420323083) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210161540 + 210161541.

It is an arithmetic number, because the mean of its divisors is an integer number (210161541).

Almost surely, 2^420323081 is an apocalyptic number.

It is an amenable number.

420323081 is a deficient number, since it is larger than the sum of its proper divisors (1).

420323081 is an equidigital number, since it uses as much as digits as its factorization.

420323081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 420323081 is about 20501.7823859293. The cubic root of 420323081 is about 749.0792142972.

The spelling of 420323081 in words is "four hundred twenty million, three hundred twenty-three thousand, eighty-one".