447863813 has 2 divisors, whose sum is σ = 447863814. Its totient is φ = 447863812.

The previous prime is 447863809. The next prime is 447863837. The reversal of 447863813 is 318368744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 443607844 + 4255969 = 21062^2 + 2063^2 .

It is a cyclic number.

It is not a de Polignac number, because 447863813 - 2² = 447863809 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447863803) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223931906 + 223931907.

It is an arithmetic number, because the mean of its divisors is an integer number (223931907).

Almost surely, 2^447863813 is an apocalyptic number.

It is an amenable number.

447863813 is a deficient number, since it is larger than the sum of its proper divisors (1).

447863813 is an equidigital number, since it uses as much as digits as its factorization.

447863813 is an evil number, because the sum of its binary digits is even.

The product of its digits is 387072, while the sum is 44.

The square root of 447863813 is about 21162.7931285074. The cubic root of 447863813 is about 765.0949306204.

The spelling of 447863813 in words is "four hundred forty-seven million, eight hundred sixty-three thousand, eight hundred thirteen".