420023207 has 2 divisors, whose sum is σ = 420023208. Its totient is φ = 420023206.

The previous prime is 420023173. The next prime is 420023273. The reversal of 420023207 is 702320024.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420023207 - 2¹⁴ = 420006823 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420023287) 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, 210011603 + 210011604.

It is an arithmetic number, because the mean of its divisors is an integer number (210011604).

Almost surely, 2^420023207 is an apocalyptic number.

420023207 is a deficient number, since it is larger than the sum of its proper divisors (1).

420023207 is an equidigital number, since it uses as much as digits as its factorization.

420023207 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 20.

The square root of 420023207 is about 20494.4677169230. The cubic root of 420023207 is about 748.9010316632.

The spelling of 420023207 in words is "four hundred twenty million, twenty-three thousand, two hundred seven".