6491684973 has 4 divisors (see below), whose sum is σ = 8655579968. Its totient is φ = 4327789980.

The previous prime is 6491684963. The next prime is 6491684977. The reversal of 6491684973 is 3794861946.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 6491684973 - 2⁶ = 6491684909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6491684977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1081947493 + ... + 1081947498.

It is an arithmetic number, because the mean of its divisors is an integer number (2163894992).

Almost surely, 2^6491684973 is an apocalyptic number.

It is an amenable number.

6491684973 is a deficient number, since it is larger than the sum of its proper divisors (2163894995).

6491684973 is a wasteful number, since it uses less digits than its factorization.

6491684973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2163894994.

The product of its digits is 7838208, while the sum is 57.

The square root of 6491684973 is about 80570.9933723049. The cubic root of 6491684973 is about 1865.4594457281.

The spelling of 6491684973 in words is "six billion, four hundred ninety-one million, six hundred eighty-four thousand, nine hundred seventy-three".