681797049 has 8 divisors (see below), whose sum is σ = 919277280. Its totient is φ = 449424096.

The previous prime is 681797023. The next prime is 681797063. The reversal of 681797049 is 940797186.

681797049 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 681797049 - 2⁸ = 681796793 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 681796992 and 681797010.

It is not an unprimeable number, because it can be changed into a prime (681997049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1276507 + ... + 1277040.

It is an arithmetic number, because the mean of its divisors is an integer number (114909660).

Almost surely, 2^681797049 is an apocalyptic number.

It is an amenable number.

681797049 is a deficient number, since it is larger than the sum of its proper divisors (237480231).

681797049 is a wasteful number, since it uses less digits than its factorization.

681797049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2553639.

The product of its (nonzero) digits is 762048, while the sum is 51.

The square root of 681797049 is about 26111.2437275592. The cubic root of 681797049 is about 880.1398921027.

The spelling of 681797049 in words is "six hundred eighty-one million, seven hundred ninety-seven thousand, forty-nine".