6493101491 has 2 divisors, whose sum is σ = 6493101492. Its totient is φ = 6493101490.

The previous prime is 6493101469. The next prime is 6493101493. The reversal of 6493101491 is 1941013946.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 6493101491 - 2³⁰ = 5419359667 is a prime.

Together with 6493101493, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (6493101493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3246550745 + 3246550746.

It is an arithmetic number, because the mean of its divisors is an integer number (3246550746).

Almost surely, 2^6493101491 is an apocalyptic number.

6493101491 is a deficient number, since it is larger than the sum of its proper divisors (1).

6493101491 is an equidigital number, since it uses as much as digits as its factorization.

6493101491 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 6493101491 is about 80579.7833888873. The cubic root of 6493101491 is about 1865.5951200416.

The spelling of 6493101491 in words is "six billion, four hundred ninety-three million, one hundred one thousand, four hundred ninety-one".