6446147 has 2 divisors, whose sum is σ = 6446148. Its totient is φ = 6446146.

The previous prime is 6446131. The next prime is 6446159. The reversal of 6446147 is 7416446.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6446147 - 2⁴ = 6446131 is a prime.

It is a super-2 number, since 2×6446147² = 83105622291218, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (6446107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3223073 + 3223074.

It is an arithmetic number, because the mean of its divisors is an integer number (3223074).

Almost surely, 2^6446147 is an apocalyptic number.

6446147 is a deficient number, since it is larger than the sum of its proper divisors (1).

6446147 is an equidigital number, since it uses as much as digits as its factorization.

6446147 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 32.

The square root of 6446147 is about 2538.9263478880. The cubic root of 6446147 is about 186.1087255026.

Subtracting 6446147 from its reverse (7416446), we obtain a cube (970299 = 99³).

The spelling of 6446147 in words is "six million, four hundred forty-six thousand, one hundred forty-seven".