6897997986 has 32 divisors (see below), whose sum is σ = 15456944448. Its totient is φ = 2033807040.

The previous prime is 6897997969. The next prime is 6897997991.

It is a happy number.

6897997986 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1409925 + ... + 1414808.

It is an arithmetic number, because the mean of its divisors is an integer number (483029514).

Almost surely, 2^6897997986 is an apocalyptic number.

6897997986 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

6897997986 is an abundant number, since it is smaller than the sum of its proper divisors (8558946462).

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

6897997986 is a wasteful number, since it uses less digits than its factorization.

6897997986 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2824786.

The product of its digits is 740710656, while the sum is 78.

The square root of 6897997986 is about 83054.1870467709. The cubic root of 6897997986 is about 1903.5941189964.

The spelling of 6897997986 in words is "six billion, eight hundred ninety-seven million, nine hundred ninety-seven thousand, nine hundred eighty-six".