423903239 has 2 divisors, whose sum is σ = 423903240. Its totient is φ = 423903238.

The previous prime is 423903217. The next prime is 423903283. The reversal of 423903239 is 932309324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 423903239 - 2¹² = 423899143 is a prime.

It is a super-2 number, since 2×423903239² = 359387912069382242, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 423903199 and 423903208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423903539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211951619 + 211951620.

It is an arithmetic number, because the mean of its divisors is an integer number (211951620).

Almost surely, 2^423903239 is an apocalyptic number.

423903239 is a deficient number, since it is larger than the sum of its proper divisors (1).

423903239 is an equidigital number, since it uses as much as digits as its factorization.

423903239 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34992, while the sum is 35.

The square root of 423903239 is about 20588.9105831270. The cubic root of 423903239 is about 751.1999983886.

The spelling of 423903239 in words is "four hundred twenty-three million, nine hundred three thousand, two hundred thirty-nine".