6491684963 has 2 divisors, whose sum is σ = 6491684964. Its totient is φ = 6491684962.

The previous prime is 6491684929. The next prime is 6491684977. The reversal of 6491684963 is 3694861946.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6491684963 is a prime.

It is a super-2 number, since 2×6491684963² = 84283947317680622738, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6491684899 and 6491684908.

It is not a weakly prime, because it can be changed into another prime (6401684963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3245842481 + 3245842482.

It is an arithmetic number, because the mean of its divisors is an integer number (3245842482).

Almost surely, 2^6491684963 is an apocalyptic number.

6491684963 is a deficient number, since it is larger than the sum of its proper divisors (1).

6491684963 is an equidigital number, since it uses as much as digits as its factorization.

6491684963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6718464, while the sum is 56.

The square root of 6491684963 is about 80570.9933102478. The cubic root of 6491684963 is about 1865.4594447702.

The spelling of 6491684963 in words is "six billion, four hundred ninety-one million, six hundred eighty-four thousand, nine hundred sixty-three".