6491873 has 2 divisors, whose sum is σ = 6491874. Its totient is φ = 6491872.

The previous prime is 6491867. The next prime is 6491893. The reversal of 6491873 is 3781946.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5870929 + 620944 = 2423^2 + 788^2 .

It is a cyclic number.

It is not a de Polignac number, because 6491873 - 2⁴ = 6491857 is a prime.

It is not a weakly prime, because it can be changed into another prime (6491813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3245936 + 3245937.

It is an arithmetic number, because the mean of its divisors is an integer number (3245937).

Almost surely, 2^6491873 is an apocalyptic number.

It is an amenable number.

6491873 is a deficient number, since it is larger than the sum of its proper divisors (1).

6491873 is an equidigital number, since it uses as much as digits as its factorization.

6491873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 38.

The square root of 6491873 is about 2547.9154224581. The cubic root of 6491873 is about 186.5477456119.

The spelling of 6491873 in words is "six million, four hundred ninety-one thousand, eight hundred seventy-three".