420402223 has 2 divisors, whose sum is σ = 420402224. Its totient is φ = 420402222.

The previous prime is 420402181. The next prime is 420402239. The reversal of 420402223 is 322204024.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420402223 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 420402223.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420402023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210201111 + 210201112.

It is an arithmetic number, because the mean of its divisors is an integer number (210201112).

Almost surely, 2^420402223 is an apocalyptic number.

420402223 is a deficient number, since it is larger than the sum of its proper divisors (1).

420402223 is an equidigital number, since it uses as much as digits as its factorization.

420402223 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 420402223 is about 20503.7124199497. The cubic root of 420402223 is about 749.1262256792.

Adding to 420402223 its reverse (322204024), we get a palindrome (742606247).

The spelling of 420402223 in words is "four hundred twenty million, four hundred two thousand, two hundred twenty-three".