681104737 has 2 divisors, whose sum is σ = 681104738. Its totient is φ = 681104736.

The previous prime is 681104731. The next prime is 681104783. The reversal of 681104737 is 737401186.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 426670336 + 254434401 = 20656^2 + 15951^2 .

It is a cyclic number.

It is not a de Polignac number, because 681104737 - 2³ = 681104729 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 681104696 and 681104705.

It is not a weakly prime, because it can be changed into another 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, 340552368 + 340552369.

It is an arithmetic number, because the mean of its divisors is an integer number (340552369).

Almost surely, 2^681104737 is an apocalyptic number.

It is an amenable number.

681104737 is a deficient number, since it is larger than the sum of its proper divisors (1).

681104737 is an equidigital number, since it uses as much as digits as its factorization.

681104737 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28224, while the sum is 37.

The square root of 681104737 is about 26097.9833895265. The cubic root of 681104737 is about 879.8418866238.

The spelling of 681104737 in words is "six hundred eighty-one million, one hundred four thousand, seven hundred thirty-seven".