6897099391 has 12 divisors (see below), whose sum is σ = 8535380592. Its totient is φ = 5457044736.

The previous prime is 6897099373. The next prime is 6897099397. The reversal of 6897099391 is 1939907986.

It is not a de Polignac number, because 6897099391 - 2¹⁵ = 6897066623 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 (6897099397) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2913906 + ... + 2916271.

It is an arithmetic number, because the mean of its divisors is an integer number (711281716).

Almost surely, 2^6897099391 is an apocalyptic number.

6897099391 is a deficient number, since it is larger than the sum of its proper divisors (1638281201).

6897099391 is a wasteful number, since it uses less digits than its factorization.

6897099391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5830210 (or 5830197 counting only the distinct ones).

The product of its (nonzero) digits is 6613488, while the sum is 61.

The square root of 6897099391 is about 83048.7771794383. Note that the first 3 decimals coincide. The cubic root of 6897099391 is about 1903.5114556670.

The spelling of 6897099391 in words is "six billion, eight hundred ninety-seven million, ninety-nine thousand, three hundred ninety-one".