447420178813 has 2 divisors, whose sum is σ = 447420178814. Its totient is φ = 447420178812.

The previous prime is 447420178753. The next prime is 447420178837. The reversal of 447420178813 is 318871024744.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 292142412004 + 155277766809 = 540502^2 + 394053^2 .

It is a cyclic number.

It is not a de Polignac number, because 447420178813 - 2²⁵ = 447386624381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447420179813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223710089406 + 223710089407.

It is an arithmetic number, because the mean of its divisors is an integer number (223710089407).

Almost surely, 2^447420178813 is an apocalyptic number.

It is an amenable number.

447420178813 is a deficient number, since it is larger than the sum of its proper divisors (1).

447420178813 is an equidigital number, since it uses as much as digits as its factorization.

447420178813 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1204224, while the sum is 49.

The spelling of 447420178813 in words is "four hundred forty-seven billion, four hundred twenty million, one hundred seventy-eight thousand, eight hundred thirteen".