6391960947 has 6 divisors (see below), whose sum is σ = 9232832492. Its totient is φ = 4261307292.

The previous prime is 6391960909. The next prime is 6391960969. The reversal of 6391960947 is 7490691936.

It is not a de Polignac number, because 6391960947 - 2²³ = 6383572339 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6391960893 and 6391960902.

It is not an unprimeable number, because it can be changed into a prime (6391960247) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 355108933 + ... + 355108950.

Almost surely, 2^6391960947 is an apocalyptic number.

6391960947 is a deficient number, since it is larger than the sum of its proper divisors (2840871545).

6391960947 is a wasteful number, since it uses less digits than its factorization.

6391960947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 710217889 (or 710217886 counting only the distinct ones).

The product of its (nonzero) digits is 2204496, while the sum is 54.

The square root of 6391960947 is about 79949.7401309097. The cubic root of 6391960947 is about 1855.8578331756.

The spelling of 6391960947 in words is "six billion, three hundred ninety-one million, nine hundred sixty thousand, nine hundred forty-seven".