420333239 has 2 divisors, whose sum is σ = 420333240. Its totient is φ = 420333238.

The previous prime is 420333217. The next prime is 420333241. The reversal of 420333239 is 932333024.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 420333239 - 2²⁸ = 151897783 is a prime.

It is a super-2 number, since 2×420333239² = 353360063616462242, which contains 22 as substring.

Together with 420333241, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (420332239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210166619 + 210166620.

It is an arithmetic number, because the mean of its divisors is an integer number (210166620).

Almost surely, 2^420333239 is an apocalyptic number.

420333239 is a deficient number, since it is larger than the sum of its proper divisors (1).

420333239 is an equidigital number, since it uses as much as digits as its factorization.

420333239 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 29.

The square root of 420333239 is about 20502.0301189907. The cubic root of 420333239 is about 749.0852486120.

The spelling of 420333239 in words is "four hundred twenty million, three hundred thirty-three thousand, two hundred thirty-nine".