447780001 has 2 divisors, whose sum is σ = 447780002. Its totient is φ = 447780000.

The previous prime is 447779999. The next prime is 447780013. The reversal of 447780001 is 100087744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 438483600 + 9296401 = 20940^2 + 3049^2 .

It is a cyclic number.

It is not a de Polignac number, because 447780001 - 2¹ = 447779999 is a prime.

Together with 447779999, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (447780041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223890000 + 223890001.

It is an arithmetic number, because the mean of its divisors is an integer number (223890001).

Almost surely, 2^447780001 is an apocalyptic number.

It is an amenable number.

447780001 is a deficient number, since it is larger than the sum of its proper divisors (1).

447780001 is an equidigital number, since it uses as much as digits as its factorization.

447780001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 447780001 is about 21160.8128624588. The cubic root of 447780001 is about 765.0472017239.

The spelling of 447780001 in words is "four hundred forty-seven million, seven hundred eighty thousand, one".