447421901 has 2 divisors, whose sum is σ = 447421902. Its totient is φ = 447421900.

The previous prime is 447421883. The next prime is 447421939. The reversal of 447421901 is 109124744.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 284731876 + 162690025 = 16874^2 + 12755^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-447421901 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (447421981) 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, 223710950 + 223710951.

It is an arithmetic number, because the mean of its divisors is an integer number (223710951).

Almost surely, 2^447421901 is an apocalyptic number.

It is an amenable number.

447421901 is a deficient number, since it is larger than the sum of its proper divisors (1).

447421901 is an equidigital number, since it uses as much as digits as its factorization.

447421901 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 447421901 is about 21152.3497749068. The cubic root of 447421901 is about 764.8432053668.

The spelling of 447421901 in words is "four hundred forty-seven million, four hundred twenty-one thousand, nine hundred one".