420332243 has 2 divisors, whose sum is σ = 420332244. Its totient is φ = 420332242.

The previous prime is 420332239. The next prime is 420332251. The reversal of 420332243 is 342233024.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 420332243 - 2² = 420332239 is a prime.

It is a super-2 number, since 2×420332243² = 353358389010822098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (420335243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210166121 + 210166122.

It is an arithmetic number, because the mean of its divisors is an integer number (210166122).

Almost surely, 2^420332243 is an apocalyptic number.

420332243 is a deficient number, since it is larger than the sum of its proper divisors (1).

420332243 is an equidigital number, since it uses as much as digits as its factorization.

420332243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3456, while the sum is 23.

The square root of 420332243 is about 20502.0058286988. The cubic root of 420332243 is about 749.0846569469.

Adding to 420332243 its reverse (342233024), we get a palindrome (762565267).

The spelling of 420332243 in words is "four hundred twenty million, three hundred thirty-two thousand, two hundred forty-three".