420323143 has 2 divisors, whose sum is σ = 420323144. Its totient is φ = 420323142.

The previous prime is 420323131. The next prime is 420323153. The reversal of 420323143 is 341323024.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420323143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420323153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210161571 + 210161572.

It is an arithmetic number, because the mean of its divisors is an integer number (210161572).

Almost surely, 2^420323143 is an apocalyptic number.

420323143 is a deficient number, since it is larger than the sum of its proper divisors (1).

420323143 is an equidigital number, since it uses as much as digits as its factorization.

420323143 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 22.

The square root of 420323143 is about 20501.7838979929. The cubic root of 420323143 is about 749.0792511283.

Adding to 420323143 its reverse (341323024), we get a palindrome (761646167).

The spelling of 420323143 in words is "four hundred twenty million, three hundred twenty-three thousand, one hundred forty-three".