447779 has 2 divisors, whose sum is σ = 447780. Its totient is φ = 447778.

The previous prime is 447757. The next prime is 447791. The reversal of 447779 is 977744.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-447779 is a prime.

It is a Chen prime.

It is a plaindrome in base 10.

It is not a weakly prime, because it can be changed into another prime (447749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223889 + 223890.

It is an arithmetic number, because the mean of its divisors is an integer number (223890).

2⁴⁴⁷⁷⁷⁹ is an apocalyptic number.

447779 is a deficient number, since it is larger than the sum of its proper divisors (1).

447779 is an equidigital number, since it uses as much as digits as its factorization.

447779 is an evil number, because the sum of its binary digits is even.

The product of its digits is 49392, while the sum is 38.

The square root of 447779 is about 669.1629099106. The cubic root of 447779 is about 76.5046631643.

The spelling of 447779 in words is "four hundred forty-seven thousand, seven hundred seventy-nine".