8561447 has 2 divisors, whose sum is σ = 8561448. Its totient is φ = 8561446.

The previous prime is 8561437. The next prime is 8561471. The reversal of 8561447 is 7441658.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 8561447 - 2⁶ = 8561383 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 (8561407) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4280723 + 4280724.

It is an arithmetic number, because the mean of its divisors is an integer number (4280724).

Almost surely, 2^8561447 is an apocalyptic number.

8561447 is a deficient number, since it is larger than the sum of its proper divisors (1).

8561447 is an equidigital number, since it uses as much as digits as its factorization.

8561447 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 35.

The square root of 8561447 is about 2925.9950444251. The cubic root of 8561447 is about 204.5733502216.

The spelling of 8561447 in words is "eight million, five hundred sixty-one thousand, four hundred forty-seven".