6897691904 has 72 divisors (see below), whose sum is σ = 15123474240. Its totient is φ = 3125219328.

The previous prime is 6897691903. The next prime is 6897691939. The reversal of 6897691904 is 4091967986.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6897691901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81044 + ... + 142700.

Almost surely, 2^6897691904 is an apocalyptic number.

6897691904 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6897691904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7561737120).

6897691904 is an abundant number, since it is smaller than the sum of its proper divisors (8225782336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6897691904 is a wasteful number, since it uses less digits than its factorization.

6897691904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61715 (or 61701 counting only the distinct ones).

The product of its (nonzero) digits is 5878656, while the sum is 59.

The square root of 6897691904 is about 83052.3443618541. The cubic root of 6897691904 is about 1903.5659627829.

The spelling of 6897691904 in words is "six billion, eight hundred ninety-seven million, six hundred ninety-one thousand, nine hundred four".