423223679 has 2 divisors, whose sum is σ = 423223680. Its totient is φ = 423223678.

The previous prime is 423223643. The next prime is 423223729. The reversal of 423223679 is 976322324.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-423223679 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 (423223079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211611839 + 211611840.

It is an arithmetic number, because the mean of its divisors is an integer number (211611840).

Almost surely, 2^423223679 is an apocalyptic number.

423223679 is a deficient number, since it is larger than the sum of its proper divisors (1).

423223679 is an equidigital number, since it uses as much as digits as its factorization.

423223679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 38.

The square root of 423223679 is about 20572.4009050961. The cubic root of 423223679 is about 750.7983670304.

The spelling of 423223679 in words is "four hundred twenty-three million, two hundred twenty-three thousand, six hundred seventy-nine".