6497279391 has 8 divisors (see below), whose sum is σ = 8663625904. Its totient is φ = 4331226240.

The previous prime is 6497279357. The next prime is 6497279417. The reversal of 6497279391 is 1939727946.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6497279391 - 2²² = 6493085087 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 (6497239391) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15040 + ... + 114981.

It is an arithmetic number, because the mean of its divisors is an integer number (1082953238).

Almost surely, 2^6497279391 is an apocalyptic number.

6497279391 is a deficient number, since it is larger than the sum of its proper divisors (2166346513).

6497279391 is a wasteful number, since it uses less digits than its factorization.

6497279391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146681.

The product of its digits is 5143824, while the sum is 57.

The square root of 6497279391 is about 80605.7032163358. The cubic root of 6497279391 is about 1865.9951650614.

The spelling of 6497279391 in words is "six billion, four hundred ninety-seven million, two hundred seventy-nine thousand, three hundred ninety-one".