420323573 has 2 divisors, whose sum is σ = 420323574. Its totient is φ = 420323572.

The previous prime is 420323543. The next prime is 420323609. The reversal of 420323573 is 375323024.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 407313124 + 13010449 = 20182^2 + 3607^2 .

It is a cyclic number.

It is not a de Polignac number, because 420323573 - 2¹² = 420319477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420323543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210161786 + 210161787.

It is an arithmetic number, because the mean of its divisors is an integer number (210161787).

Almost surely, 2^420323573 is an apocalyptic number.

It is an amenable number.

420323573 is a deficient number, since it is larger than the sum of its proper divisors (1).

420323573 is an equidigital number, since it uses as much as digits as its factorization.

420323573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15120, while the sum is 29.

The square root of 420323573 is about 20501.7943848825. The cubic root of 420323573 is about 749.0795065698.

Adding to 420323573 its reverse (375323024), we get a palindrome (795646597).

The spelling of 420323573 in words is "four hundred twenty million, three hundred twenty-three thousand, five hundred seventy-three".