423779 has 2 divisors, whose sum is σ = 423780. Its totient is φ = 423778.

The previous prime is 423769. The next prime is 423781. The reversal of 423779 is 977324.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 423779 - 2⁴ = 423763 is a prime.

Together with 423781, it forms a pair of twin primes.

It is a Chen prime.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 423779.

It is not a weakly prime, because it can be changed into another prime (423749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211889 + 211890.

It is an arithmetic number, because the mean of its divisors is an integer number (211890).

2⁴²³⁷⁷⁹ is an apocalyptic number.

423779 is a deficient number, since it is larger than the sum of its proper divisors (1).

423779 is an equidigital number, since it uses as much as digits as its factorization.

423779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10584, while the sum is 32.

The square root of 423779 is about 650.9831026993. The cubic root of 423779 is about 75.1126603136.

The spelling of 423779 in words is "four hundred twenty-three thousand, seven hundred seventy-nine".