8447641 has 2 divisors, whose sum is σ = 8447642. Its totient is φ = 8447640.

The previous prime is 8447627. The next prime is 8447653. The reversal of 8447641 is 1467448.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7862416 + 585225 = 2804^2 + 765^2 .

It is a cyclic number.

It is not a de Polignac number, because 8447641 - 2⁹ = 8447129 is a prime.

It is equal to p₅₆₇₈₁₇ and since 8447641 and 567817 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 8447597 and 8447606.

It is not a weakly prime, because it can be changed into another prime (8447611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4223820 + 4223821.

It is an arithmetic number, because the mean of its divisors is an integer number (4223821).

Almost surely, 2^8447641 is an apocalyptic number.

It is an amenable number.

8447641 is a deficient number, since it is larger than the sum of its proper divisors (1).

8447641 is an equidigital number, since it uses as much as digits as its factorization.

8447641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21504, while the sum is 34.

The square root of 8447641 is about 2906.4825820913. The cubic root of 8447641 is about 203.6628498024.

The spelling of 8447641 in words is "eight million, four hundred forty-seven thousand, six hundred forty-one".