6444491 has 2 divisors, whose sum is σ = 6444492. Its totient is φ = 6444490.

The previous prime is 6444481. The next prime is 6444517. The reversal of 6444491 is 1944446.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6444491 - 2¹⁰ = 6443467 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6444481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3222245 + 3222246.

It is an arithmetic number, because the mean of its divisors is an integer number (3222246).

Almost surely, 2^6444491 is an apocalyptic number.

6444491 is a deficient number, since it is larger than the sum of its proper divisors (1).

6444491 is an equidigital number, since it uses as much as digits as its factorization.

6444491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 32.

The square root of 6444491 is about 2538.6002048373. The cubic root of 6444491 is about 186.0927871731.

The spelling of 6444491 in words is "six million, four hundred forty-four thousand, four hundred ninety-one".