681484186 has 16 divisors (see below), whose sum is σ = 1029574728. Its totient is φ = 338299200.

The previous prime is 681484171. The next prime is 681484201.

681484186 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (681484171) and next prime (681484201).

It can be written as a sum of positive squares in 4 ways, for example, as 224850025 + 456634161 = 14995^2 + 21369^2 .

It is an unprimeable number.

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, 296056 + ... + 298348.

Almost surely, 2^681484186 is an apocalyptic number.

681484186 is a deficient number, since it is larger than the sum of its proper divisors (348090542).

681484186 is a wasteful number, since it uses less digits than its factorization.

681484186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3297.

The product of its digits is 294912, while the sum is 46.

The square root of 681484186 is about 26105.2520769289. The cubic root of 681484186 is about 880.0052453200.

The spelling of 681484186 in words is "six hundred eighty-one million, four hundred eighty-four thousand, one hundred eighty-six".