681431012 has 6 divisors (see below), whose sum is σ = 1192504278. Its totient is φ = 340715504.

The previous prime is 681430999. The next prime is 681431027. The reversal of 681431012 is 210134186.

It can be written as a sum of positive squares in only one way, i.e., 679853476 + 1577536 = 26074^2 + 1256^2 .

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 as a sum of consecutive naturals, namely, 85178873 + ... + 85178880.

It is an arithmetic number, because the mean of its divisors is an integer number (198750713).

Almost surely, 2^681431012 is an apocalyptic number.

It is an amenable number.

681431012 is a deficient number, since it is larger than the sum of its proper divisors (511073266).

681431012 is a wasteful number, since it uses less digits than its factorization.

681431012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170357757 (or 170357755 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 681431012 is about 26104.2336030001. The cubic root of 681431012 is about 879.9823567399.

Adding to 681431012 its reverse (210134186), we get a palindrome (891565198).

The spelling of 681431012 in words is "six hundred eighty-one million, four hundred thirty-one thousand, twelve".