423847 has 2 divisors, whose sum is σ = 423848. Its totient is φ = 423846.

The previous prime is 423823. The next prime is 423853. The reversal of 423847 is 748324.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423847 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 (423887) 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, 211923 + 211924.

It is an arithmetic number, because the mean of its divisors is an integer number (211924).

2⁴²³⁸⁴⁷ is an apocalyptic number.

423847 is a deficient number, since it is larger than the sum of its proper divisors (1).

423847 is an equidigital number, since it uses as much as digits as its factorization.

423847 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5376, while the sum is 28.

The square root of 423847 is about 651.0353293025. The cubic root of 423847 is about 75.1166776495.

It can be divided in two parts, 423 and 847, that multiplied together give a triangular number (358281 = T₈₄₆).

The spelling of 423847 in words is "four hundred twenty-three thousand, eight hundred forty-seven".