447320561 has 2 divisors, whose sum is σ = 447320562. Its totient is φ = 447320560.

The previous prime is 447320501. The next prime is 447320593. The reversal of 447320561 is 165023744.

It is an a-pointer prime, because the next prime (447320593) can be obtained adding 447320561 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442302961 + 5017600 = 21031^2 + 2240^2 .

It is a cyclic number.

It is not a de Polignac number, because 447320561 - 2²⁶ = 380211697 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (447320501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 223660280 + 223660281.

It is an arithmetic number, because the mean of its divisors is an integer number (223660281).

Almost surely, 2^447320561 is an apocalyptic number.

It is an amenable number.

447320561 is a deficient number, since it is larger than the sum of its proper divisors (1).

447320561 is an equidigital number, since it uses as much as digits as its factorization.

447320561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 447320561 is about 21149.9541607068. The cubic root of 447320561 is about 764.7854559488.

The spelling of 447320561 in words is "four hundred forty-seven million, three hundred twenty thousand, five hundred sixty-one".