681343186 has 8 divisors (see below), whose sum is σ = 1022269680. Its totient is φ = 340586628.

The previous prime is 681343171. The next prime is 681343219.

It is a happy number.

681343186 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31936 + ... + 48811.

It is an arithmetic number, because the mean of its divisors is an integer number (127783710).

Almost surely, 2^681343186 is an apocalyptic number.

681343186 is a deficient number, since it is larger than the sum of its proper divisors (340926494).

681343186 is a wasteful number, since it uses less digits than its factorization.

681343186 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84968.

The product of its digits is 82944, while the sum is 40.

The square root of 681343186 is about 26102.5513312396. The cubic root of 681343186 is about 879.9445497085.

The spelling of 681343186 in words is "six hundred eighty-one million, three hundred forty-three thousand, one hundred eighty-six".