681104738 has 4 divisors (see below), whose sum is σ = 1021657110. Its totient is φ = 340552368.

The previous prime is 681104737. The next prime is 681104783. The reversal of 681104738 is 837401186.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 485188729 + 195916009 = 22027^2 + 13997^2 .

It is not an unprimeable number, because it can be changed into a prime (681104731) 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 as a sum of consecutive naturals, namely, 170276183 + ... + 170276186.

Almost surely, 2^681104738 is an apocalyptic number.

681104738 is a deficient number, since it is larger than the sum of its proper divisors (340552372).

681104738 is a wasteful number, since it uses less digits than its factorization.

681104738 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340552371.

The product of its (nonzero) digits is 32256, while the sum is 38.

The square root of 681104738 is about 26097.9834086850. The cubic root of 681104738 is about 879.8418870544.

The spelling of 681104738 in words is "six hundred eighty-one million, one hundred four thousand, seven hundred thirty-eight".