420023273 has 2 divisors, whose sum is σ = 420023274. Its totient is φ = 420023272.

The previous prime is 420023207. The next prime is 420023281. The reversal of 420023273 is 372320024.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 263347984 + 156675289 = 16228^2 + 12517^2 .

It is a cyclic number.

It is not a de Polignac number, because 420023273 - 2⁸ = 420023017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (420023173) 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, 210011636 + 210011637.

It is an arithmetic number, because the mean of its divisors is an integer number (210011637).

Almost surely, 2^420023273 is an apocalyptic number.

It is an amenable number.

420023273 is a deficient number, since it is larger than the sum of its proper divisors (1).

420023273 is an equidigital number, since it uses as much as digits as its factorization.

420023273 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 23.

The square root of 420023273 is about 20494.4693271136. The cubic root of 420023273 is about 748.9010708891.

Adding to 420023273 its reverse (372320024), we get a palindrome (792343297).

The spelling of 420023273 in words is "four hundred twenty million, twenty-three thousand, two hundred seventy-three".