6840386997 has 4 divisors (see below), whose sum is σ = 9120516000. Its totient is φ = 4560257996.

The previous prime is 6840386953. The next prime is 6840386999. The reversal of 6840386997 is 7996830486.

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 a cyclic number.

It is not a de Polignac number, because 6840386997 - 2¹⁰ = 6840385973 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6840386997.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6840386999) 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 3 ways as a sum of consecutive naturals, for example, 1140064497 + ... + 1140064502.

It is an arithmetic number, because the mean of its divisors is an integer number (2280129000).

Almost surely, 2^6840386997 is an apocalyptic number.

It is an amenable number.

6840386997 is a deficient number, since it is larger than the sum of its proper divisors (2280129003).

6840386997 is a wasteful number, since it uses less digits than its factorization.

6840386997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2280129002.

The product of its (nonzero) digits is 15676416, while the sum is 60.

The square root of 6840386997 is about 82706.6321222186. The cubic root of 6840386997 is about 1898.2797908688.

The spelling of 6840386997 in words is "six billion, eight hundred forty million, three hundred eighty-six thousand, nine hundred ninety-seven".